| mountainside | (noun) the side or slope of a mountain | Synonyms: versant |
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| mucopolysaccharide | (noun) complex polysaccharides containing an amino group; occur chiefly as components of connective tissue | - |
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| mudslide | (noun) a landslide of mud | - |
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| multitude | (noun) a large gathering of people | Synonyms: concourse, throng |
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| (noun) the common people generally | Synonyms: hoi polloi, mass, masses, people, the great unwashed |
| (noun) a large indefinite quantity | Synonyms: battalion, large number, pack, plurality |
| nationwide | (adjective) occurring or extending throughout a country or nation | Synonyms: countrywide |
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| (adverb) extending throughout an entire nation | Synonyms: across the country, across the nation, nationally |
| nearside | (noun) the side of a vehicle nearest the kerb | - |
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| nematode | (noun) unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic | Synonyms: nematode worm, roundworm |
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| nightshade | (noun) any of numerous shrubs or herbs or vines of the genus Solanum; most are poisonous though many bear edible fruit | - |
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| nitride | (noun) a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal) | - |
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| node | (noun) (computer science) any computer that is hooked up to a computer network | Synonyms: client, guest |
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| (noun) any bulge or swelling of an anatomical structure or part | - |
| (noun) the source of lymph and lymphocytes | Synonyms: lymph gland, lymph node |
| (noun) (astronomy) a point where an orbit crosses a plane | - |
| (noun) (physics) the point of minimum displacement in a periodic system | - |
| (noun) (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge | Synonyms: leaf node |
| (noun) any thickened enlargement | Synonyms: knob, thickening |
| (noun) a connecting point at which several lines come together | - |
| noontide | (noun) the middle of the day | Synonyms: high noon, midday, noon, noonday, twelve noon |
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| nucleoside | (noun) a glycoside formed by partial hydrolysis of a nucleic acid | - |
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| nucleotide | (noun) a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) | Synonyms: base |
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| nude | (adjective) having no clothes on the body | Synonyms: au naturel, bare, naked |
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| (noun) a painting of a naked human figure | Synonyms: nude painting |
| (noun) a statue of a naked human figure | Synonyms: nude sculpture, nude statue |
| (noun) a naked person | Synonyms: nude person |
| (noun) without clothing (especially in the phrase `in the nude') | - |
| obtrude | (verb) thrust oneself in as if by force | Synonyms: intrude |
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| (verb) push to thrust outward | Synonyms: push out, thrust out |
| occlude | (verb) block passage through | Synonyms: block, close up, impede, jam, obstruct, obturate |
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| ode | (noun) a lyric poem with complex stanza forms | - |
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| offside | (adjective) illegally beyond a prescribed line or area or ahead of the ball or puck | Synonyms: offsides |
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| (noun) (sport) the mistake of occupying an illegal position on the playing field (in football, soccer, ice hockey, field hockey, etc.) | - |
| (adverb) illegally in advance of the ball or puck | - |
| oligonucleotide | (noun) (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides | Synonyms: oligo |
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| oligosaccharide | (noun) any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis | - |
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| onside | (adjective) not offside; being within the prescribed area of play | - |
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| orangeade | (noun) sweetened beverage of diluted orange juice | - |
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| oreide | (noun) alloy of copper and tin and zinc; used in imitation gold jewelry | Synonyms: oroide |
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| oroide | (noun) alloy of copper and tin and zinc; used in imitation gold jewelry | Synonyms: oreide |
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| outmode | (verb) make unfashionable, outdated, or obsolete | - |
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| outride | (verb) ride better, faster, or further than | - |
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| (verb) hang on during a trial of endurance | Synonyms: last out, ride out, stay |
| outside | (adjective) relating to or being on or near the outer side or limit | - |
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| (adjective) located, suited for, or taking place in the open air | Synonyms: out-of-door, outdoor |
| (adjective) leading to or from the outside | - |
| (adjective) originating or belonging beyond some bounds | - |
| (adjective) functioning outside the boundaries or precincts of an organized unit | - |
| (adjective) coming from the outside | Synonyms: external, extraneous |
| (adjective) from or between other countries | Synonyms: external, international |
| (adjective) (of a baseball pitch) on the far side of home plate from the batter | Synonyms: away |
| (adjective) on or toward an outer edge | - |
| (adjective) unlikely to occur | Synonyms: remote |
| (noun) the outer side or surface of something | Synonyms: exterior |
| (noun) the region that is outside of something | Synonyms: exterior |
| (adverb) outside a building | Synonyms: alfresco, out of doors, outdoors |
| (adverb) on the outside | - |
| override | (noun) the act of nullifying; making null and void; counteracting or overriding the effect or force of something | Synonyms: nullification |
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| (noun) a manually operated device to correct the operation of an automatic device | - |
| (verb) rule against | Synonyms: overrule, overthrow, overturn, reverse |
| (verb) ride (a horse) too hard | - |
| (verb) counteract the normal operation of (an automatic gear shift in a vehicle) | - |
| (verb) prevail over | - |
| overside | (adverb) over the side of a boat | - |
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| oxide | (noun) any compound of oxygen with another element or a radical | - |
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| ozonide | (noun) any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound | - |
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| palisade | (noun) fortification consisting of a strong fence made of stakes driven into the ground | - |
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| (verb) surround with a wall in order to fortify | Synonyms: fence, fence in, surround, wall |
| paloverde | (noun) a thorny shrub of the genus Cercidium that grows in dry parts of the southwestern United States and adjacent Mexico; has smooth light green bark and racemes of yellow flowers and small leaves | - |
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| parade | (noun) a visible display | - |
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| (noun) a ceremonial procession including people marching | - |
| (noun) an extended (often showy) succession of persons or things | - |
| (verb) march in a procession in a public place | Synonyms: promenade, troop |
| (verb) walk ostentatiously | Synonyms: exhibit, march |
| paraldehyde | (noun) a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent | Synonyms: ethanal trimer |
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| parricide | (noun) the murder of your own father or mother | - |
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| (noun) someone who kills his or her parent | - |
| pasquinade | (noun) a composition that imitates or misrepresents somebody's style, usually in a humorous way | Synonyms: burlesque, lampoon, mockery, parody, put-on, send-up, sendup, spoof, takeoff, travesty |
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| patricide | (noun) the murder of your father | - |
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| (noun) a person who murders their father | - |
| paygrade | (noun) rank in a military organization | Synonyms: military rank, military rating, rating |
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| pediculicide | (noun) a chemical agent that kills lice | - |
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| pentode | (noun) a thermionic tube having five electrodes | - |
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| pentoxide | (noun) an oxide containing five atoms of oxygen in the molecule | - |
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| peptide | (noun) amide combining the amino group of one amino acid with the carboxyl group of another; usually obtained by partial hydrolysis of protein | - |
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| perchloride | (noun) a chloride containing an unusually high proportion of chlorine | - |
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| peroxide | (noun) a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels | Synonyms: hydrogen peroxide |
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| (noun) an inorganic compound containing the divalent ion -O-O- | - |
| (verb) bleach with peroxide | - |
| persuade | (verb) cause somebody to adopt a certain position, belief, or course of action; twist somebody's arm | - |
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| (verb) win approval or support for | Synonyms: carry, sway |
| pervade | (verb) spread or diffuse through | Synonyms: diffuse, imbue, interpenetrate, penetrate, permeate, riddle |
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| pesticide | (noun) a chemical used to kill pests (as rodents or insects) | - |
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| phensuximide | (noun) anticonvulsant (trade name Milontin) used to treat petit mal | Synonyms: Milontin |
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| phenylacetamide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, acetanilide |
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| photocathode | (noun) a cathode that emits electrons when illuminated | - |
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| phylloclade | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladode, cladophyll, phylloclad |
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| phyllode | (noun) an expanded petiole taking on the function of a leaf blade | - |
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| pimozide | (noun) the most commonly used diphenylbutyl piperidine | - |
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| pistillode | (noun) a sterile vestigial pistil remaining in a staminate flower | - |
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| pitchblende | (noun) a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore | Synonyms: uraninite |
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| plantigrade | (adjective) (of mammals) walking on the whole sole of the foot (as rabbits, raccoons, bears, and humans do) | - |
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| (noun) an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings | Synonyms: plantigrade mammal |
| platitude | (noun) a trite or obvious remark | Synonyms: banality, bromide, cliche, commonplace |
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| plenitude | (noun) a full supply | Synonyms: plenteousness, plentifulness, plentitude, plenty |
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| plentitude | (noun) a full supply | Synonyms: plenitude, plenteousness, plentifulness, plenty |
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| polyamide | (noun) a polymer containing repeated amide groups | Synonyms: polymeric amide |
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| polynucleotide | (noun) (biochemistry) a linear polymer whose molecule is composed of many nucleotide units constituting a section of a nucleic acid molecule | - |
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| polypeptide | (noun) a peptide containing 10 to more than 100 amino acids | - |
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| polysaccharide | (noun) any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules | Synonyms: polyose |
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| pomade | (noun) hairdressing consisting of a perfumed oil or ointment | Synonyms: pomatum |
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| (verb) apply pomade to (hair) | - |
| postcode | (noun) a code of letters and digits added to a postal address to aid in the sorting of mail | Synonyms: postal code, ZIP, ZIP code |
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| postlude | (noun) a voluntary played at the end of a religious service | - |
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| precede | (verb) furnish with a preface or introduction | Synonyms: introduce, preface, premise |
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| (verb) move ahead (of others) in time or space | Synonyms: lead |
| (verb) be the predecessor of | Synonyms: come before |
| (verb) be earlier in time; go back further | Synonyms: antecede, antedate, forego, forgo, predate |
| (verb) come before | Synonyms: predate |
| preclude | (verb) keep from happening or arising; make impossible | Synonyms: forbid, foreclose, forestall, prevent |
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| (verb) make impossible, especially beforehand | Synonyms: close out, rule out |
| prelude | (noun) music that precedes a fugue or introduces an act in an opera | - |
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| (noun) something that serves as a preceding event or introduces what follows | Synonyms: overture, preliminary |
| (verb) play as a prelude | - |
| (verb) serve as a prelude or opening to | - |
| preside | (verb) act as president | - |
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| pride | (noun) unreasonable and inordinate self-esteem (personified as one of the deadly sins) | Synonyms: superbia |
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| (noun) the trait of being spurred on by a dislike of falling below your standards | - |
| (noun) a feeling of self-respect and personal worth | Synonyms: pridefulness |
| (noun) satisfaction with your (or another's) achievements | - |
| (noun) a group of lions | - |
| (verb) be proud of | Synonyms: congratulate, plume |
| promenade | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, perambulation, saunter, stroll |
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| (noun) a march of all the guests at the opening of a formal dance | - |
| (noun) a square dance figure; couples march counterclockwise in a circle | - |
| (noun) a public area set aside as a pedestrian walk | Synonyms: mall |
| (noun) a formal ball held for a school class toward the end of the academic year | Synonyms: prom |
| (verb) take a leisurely walk | - |
| (verb) march in a procession in a public place | Synonyms: parade, troop |
| promptitude | (noun) the characteristic of doing things without delay | Synonyms: promptness |
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| propanamide | (noun) the amide of propionic acid (C2H5CONH2) | Synonyms: proprionamide |
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| propionaldehyde | (noun) a colorless liquid aldehyde | Synonyms: propanal |
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| proprionamide | (noun) the amide of propionic acid (C2H5CONH2) | Synonyms: propanamide |
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| protrude | (verb) swell or protrude outwards | Synonyms: bulge, pouch |
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| (verb) bulge outward | Synonyms: bug out, bulge, bulge out, come out, pop, pop out, start |
| (verb) extend out or project in space | Synonyms: jut, jut out, project, stick out |
| provide | (verb) take measures in preparation for | - |
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| (verb) determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation | - |
| (verb) give what is desired or needed, especially support, food or sustenance | Synonyms: cater, ply, supply |
| (verb) give something useful or necessary to | Synonyms: furnish, offer, render, supply |
| (verb) supply means of subsistence; earn a living | Synonyms: bring home the bacon |
| (verb) mount or put up | Synonyms: offer, put up |
| (verb) make a possibility or provide opportunity for; permit to be attainable or cause to remain | Synonyms: allow, allow for, leave |
| prude | (noun) a person excessively concerned about propriety and decorum | Synonyms: puritan |
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| pulchritude | (noun) physical beauty (especially of a woman) | - |
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| quietude | (noun) a state of peace and quiet | Synonyms: quietness, tranquility, tranquillity |
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| rawhide | (noun) untanned hide especially of cattle; cut in strips it is used for whips and ropes | - |
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| razorblade | (noun) a blade that has very sharp edge | - |
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| recede | (verb) become faint or more distant | - |
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| (verb) retreat | Synonyms: drop off, fall back, fall behind |
| (verb) pull back or move away or backward | Synonyms: draw back, move back, pull away, pull back, retire, retreat, withdraw |
| recode | (verb) put into a different code; rearrange mentally | - |
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| rectitude | (noun) righteousness as a consequence of being honorable and honest | Synonyms: uprightness |
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| rede | (verb) give advice to | Synonyms: advise, counsel |
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| (verb) give an interpretation or explanation to | Synonyms: interpret |
| regicide | (noun) the act of killing a king | - |
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| (noun) someone who commits regicide; the killer of a king | - |
| renegade | (adjective) having deserted a cause or principle | Synonyms: recreant |
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| (noun) someone who rebels and becomes an outlaw | - |
| (noun) a disloyal person who betrays or deserts his cause or religion or political party or friend etc. | Synonyms: apostate, deserter, ratter, recreant, turncoat |
| (verb) break with established customs | Synonyms: rebel |
| reside | (verb) make one's home in a particular place or community | Synonyms: domicile, domiciliate, shack |
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| (verb) live (in a certain place) | Synonyms: lodge in, occupy |
| (verb) be inherent or innate in | Synonyms: repose, rest |
| retrograde | (adjective) of amnesia; affecting time immediately preceding trauma | - |
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| (adjective) moving from east to west on the celestial sphere; or--for planets--around the sun in a direction opposite to that of the Earth | - |
| (adjective) going from better to worse | Synonyms: retrogressive |
| (adjective) moving or directed or tending in a backward direction or contrary to a previous direction | Synonyms: retral |
| (verb) get worse or fall back to a previous condition | Synonyms: regress, retrogress |
| (verb) go back over | Synonyms: hash over, rehash |
| (verb) move back | Synonyms: retreat |
| (verb) move in a direction contrary to the usual one | - |
| (verb) move backward in an orbit, of celestial bodies | - |
| rhodomontade | (noun) vain and empty boasting | Synonyms: bluster, braggadocio, rodomontade |
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| ride | (noun) a journey in a vehicle (usually an automobile) | Synonyms: drive |
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| (noun) a mechanical device that you ride for amusement or excitement | - |
| (verb) harass with persistent criticism or carping | Synonyms: bait, cod, rag, rally, razz, tantalise, tantalize, taunt, tease, twit |
| (verb) keep partially engaged by slightly depressing a pedal with the foot | - |
| (verb) copulate with | Synonyms: mount |
| (verb) be carried or travel on or in a vehicle | - |
| (verb) sit and travel on the back of animal, usually while controlling its motions | Synonyms: sit |
| (verb) move like a floating object | - |
| (verb) climb up on the body | - |
| (verb) sit on and control a vehicle | - |
| (verb) ride over, along, or through | - |
| (verb) continue undisturbed and without interference | - |
| (verb) lie moored or anchored | - |
| (verb) have certain properties when driven | Synonyms: drive |
| (verb) be sustained or supported or borne | - |
| (verb) be contingent on | Synonyms: depend on, depend upon, devolve on, hinge on, hinge upon, turn on |
| ringside | (noun) first row of seating; has an unobstructed view of a boxing or wrestling ring | Synonyms: ringside seat |
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| riptide | (noun) a strong surface current flowing outwards from a shore | Synonyms: rip current |
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| (noun) a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current | Synonyms: countercurrent, crosscurrent, rip, tide rip |
| riverside | (noun) the bank of a river | Synonyms: riverbank |
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| roadside | (noun) edge of a way or road or path | Synonyms: wayside |
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| rockslide | (noun) a landslide of rocks | - |
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| rodomontade | (noun) vain and empty boasting | Synonyms: bluster, braggadocio, rhodomontade |
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