| conventicle | (noun) a building for religious assembly (especially Nonconformists, e.g., Quakers) | Synonyms: meetinghouse |
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| (noun) a secret unauthorized meeting for religious worship | - |
| coracle | (noun) a small rounded boat made of hides stretched over a wicker frame; still used in some parts of Great Britain | - |
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| corpuscle | (noun) either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets | Synonyms: blood cell, blood corpuscle |
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| (noun) (nontechnical usage) a tiny piece of anything | Synonyms: atom, molecule, mote, particle, speck |
| crepuscle | (noun) the time of day immediately following sunset | Synonyms: crepuscule, dusk, evenfall, fall, gloam, gloaming, nightfall, twilight |
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| cubicle | (noun) small area set off by walls for special use | Synonyms: booth, kiosk, stall |
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| (noun) small individual study area in a library | Synonyms: carrel, carrell, stall |
| (noun) small room in which a monk or nun lives | Synonyms: cell |
| cuticle | (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: carapace, shell, shield |
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| (noun) the outer layer of the skin covering the exterior body surface of vertebrates | Synonyms: epidermis |
| (noun) the dead skin at the base of a fingernail or toenail | - |
| cycle | (noun) a wheeled vehicle that has two wheels and is moved by foot pedals | Synonyms: bicycle, bike, wheel |
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| (noun) a single complete execution of a periodically repeated phenomenon | Synonyms: oscillation |
| (noun) a periodically repeated sequence of events | - |
| (noun) a series of poems or songs on the same theme | - |
| (noun) an interval during which a recurring sequence of events occurs | Synonyms: rhythm, round |
| (noun) the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz) | Synonyms: cps, cycle per second, cycles/second, hertz, Hz |
| (verb) recur in repeating sequences | - |
| (verb) ride a motorcycle | Synonyms: motorbike, motorcycle |
| (verb) ride a bicycle | Synonyms: bicycle, bike, pedal, wheel |
| (verb) pass through a cycle | - |
| (verb) cause to go through a recurring sequence | - |
| debacle | (noun) a sound defeat | Synonyms: drubbing, slaughter, thrashing, trouncing, walloping, whipping |
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| (noun) a sudden and violent collapse | Synonyms: fiasco |
| (noun) flooding caused by a tumultuous breakup of ice in a river during the spring or summer | - |
| declension | (noun) a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms | - |
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| (noun) a downward slope or bend | Synonyms: declination, decline, declivity, descent, downslope, fall |
| (noun) process of changing to an inferior state | Synonyms: decline in quality, deterioration, worsening |
| (noun) the inflection of nouns and pronouns and adjectives in Indo-European languages | - |
| denticle | (noun) small pointed ridge on the exoskeleton of an arthropod | - |
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| deoxynucleotide | (noun) Any nucleotide that contains a deoxy sugar. | - |
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| dermatosclerosis | (noun) an autoimmune disease that affects the blood vessels and connective tissue; fibrous connective tissue is deposited in the skin | Synonyms: scleroderma |
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| ecclesiastic | (adjective) of or associated with a church (especially a Christian Church) | Synonyms: ecclesiastical |
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| (noun) a clergyman or other person in religious orders | Synonyms: churchman, cleric, divine |
| ecclesiastical | (adjective) of or associated with a church (especially a Christian Church) | Synonyms: ecclesiastic |
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| ecclesiastically | (adverb) in an ecclesiastic manner | - |
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| ecclesiasticism | (noun) excessive adherence to ecclesiastical forms and activities | - |
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| (noun) religion appropriate to a church and to ecclesiastical principles and practices | - |
| ecclesiology | (noun) the branch of theology concerned with the nature and the constitution and the functions of a church | - |
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| eclectic | (adjective) selecting what seems best of various styles or ideas | - |
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| (noun) someone who selects according to the eclectic method | Synonyms: eclecticist |
| eclecticism | (noun) making decisions on the basis of what seems best instead of following some single doctrine or style | Synonyms: eclectic method |
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| eclecticist | (noun) someone who selects according to the eclectic method | Synonyms: eclectic |
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| encircle | (verb) bind with something round or circular | Synonyms: gird |
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| (verb) form or draw a circle around | Synonyms: circle |
| encircled | (adjective) confined on all sides | Synonyms: surrounded |
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| encirclement | (noun) a war measure that isolates some area of importance to the enemy | Synonyms: blockade |
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| endonuclease | (noun) a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes | - |
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| enucleate | (verb) remove (a tumor or eye) from an enveloping sac or cover | - |
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| (verb) remove the nucleus from (a cell) | - |
| enucleation | (noun) surgical removal of something without cutting into it | - |
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| epicycle | (noun) a circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid | - |
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| episcleritis | (noun) inflammation of the sclera of the eye | - |
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| exercycle | (noun) an exercise device resembling a stationary bike | Synonyms: exercise bike |
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| exonuclease | (noun) a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid | - |
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| fascicle | (noun) a bundle of fibers (especially nerve fibers) | Synonyms: fasciculus, fiber bundle, fibre bundle |
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| (noun) an installment of a printed work | Synonyms: fascicule |
| follicle | (noun) any small spherical group of cells containing a cavity | - |
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| funicle | (noun) the stalk of a plant ovule or seed | Synonyms: funiculus |
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| furuncle | (noun) a painful sore with a hard core filled with pus | Synonyms: boil |
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| gigacycle | (noun) 1,000,000,000 periods per second | Synonyms: Gc, GHz, gigacycle per second, gigahertz |
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| granduncle | (noun) an uncle of your father or mother | Synonyms: great-uncle |
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| hemicycle | (noun) a plane figure with the shape of half a circle | Synonyms: semicircle |
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| heterocycle | (noun) a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon | Synonyms: heterocyclic ring |
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| (noun) a compound containing a heterocyclic ring | Synonyms: heterocyclic, heterocyclic compound |
| houseclean | (verb) clean and tidy up the house | Synonyms: clean, clean house |
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| housecleaning | (noun) the act of cleaning the rooms and furnishings of a house | - |
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| (noun) (figurative) the act of reforming by the removal of unwanted personnel or practices or conditions | - |
| icicle | (noun) ice resembling a pendent spear, formed by the freezing of dripping water | - |
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| inclemency | (noun) excessive sternness | Synonyms: hardness, harshness, rigor, rigorousness, rigour, rigourousness, severeness, severity, stiffness |
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| (noun) weather unsuitable for outdoor activities | Synonyms: bad weather, inclementness |
| inclement | (adjective) used of persons or behavior; showing no clemency or mercy | - |
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| (adjective) (of weather or climate) severe | - |
| inclementness | (noun) weather unsuitable for outdoor activities | Synonyms: bad weather, inclemency |
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| keratoscleritis | (noun) inflammation of the cornea and sclera of the eye | - |
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| kilocycle | (noun) one thousand periods per second | Synonyms: kc, kHz, kilocycle per second, kilohertz |
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| manacle | (noun) shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs | Synonyms: cuff, handcuff, handlock |
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| (verb) confine or restrain with or as if with manacles or handcuffs | Synonyms: cuff, handcuff |
| megacycle | (noun) one million periods per second | Synonyms: Mc, megacycle per second, megahertz, MHz |
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| miracle | (noun) any amazing or wonderful occurrence | - |
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| (noun) a marvellous event manifesting a supernatural act of a divine agent | - |
| monocle | (noun) lens for correcting defective vision in one eye; held in place by facial muscles | Synonyms: eyeglass |
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| monocled | (adjective) wearing, or having the face adorned with, eyeglasses or an eyeglass | Synonyms: bespectacled, spectacled |
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| monocycle | (noun) a vehicle with a single wheel that is driven by pedals | Synonyms: unicycle |
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| mononuclear | (adjective) having only one nucleus | Synonyms: mononucleate |
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| mononucleate | (adjective) having only one nucleus | Synonyms: mononuclear |
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| mononucleosis | (noun) an acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream; not highly contagious; some believe it can be transmitted by kissing | Synonyms: glandular fever, infectious mononucleosis, kissing disease, mono |
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| motorcycle | (noun) a motor vehicle with two wheels and a strong frame | Synonyms: bike |
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| (verb) ride a motorcycle | Synonyms: cycle, motorbike |
| multinucleate | (adjective) having two or more nuclei | - |
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| muscle | (noun) possessing muscular strength | Synonyms: brawn, brawniness, heftiness, muscularity, sinew |
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| (noun) authority or power or force (especially when used in a coercive way) | - |
| (noun) one of the contractile organs of the body | Synonyms: musculus |
| (noun) animal tissue consisting predominantly of contractile cells | Synonyms: muscular tissue |
| (noun) a bully employed as a thug or bodyguard | Synonyms: muscleman |
| (verb) make one's way by force | - |
| musclebuilder | (noun) someone who does special exercises to develop a brawny musculature | Synonyms: bodybuilder, muscle-builder, muscle builder, muscleman |
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| musclebuilding | (noun) exercise that builds muscles through tension | Synonyms: anaerobic exercise, bodybuilding, muscle building |
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| muscleman | (noun) a bully employed as a thug or bodyguard | Synonyms: muscle |
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| (noun) someone who does special exercises to develop a brawny musculature | Synonyms: bodybuilder, muscle-builder, muscle builder, musclebuilder |
| nephroangiosclerosis | (noun) kidney disease that is usually associated with hypertension; sclerosis of the renal arterioles reduces blood flow that can lead to kidney failure and heart failure | Synonyms: nephrosclerosis |
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| nephrosclerosis | (noun) kidney disease that is usually associated with hypertension; sclerosis of the renal arterioles reduces blood flow that can lead to kidney failure and heart failure | Synonyms: nephroangiosclerosis |
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| nuclear | (adjective) (weapons) deriving destructive energy from the release of atomic energy | Synonyms: atomic |
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| (adjective) of or relating to or constituting the nucleus of an atom | - |
| (adjective) of or relating to or constituting the nucleus of a cell | - |
| (adjective) constituting or like a nucleus | - |
| nuclease | (noun) general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units | - |
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| nucleate | (adjective) having a nucleus or occurring in the nucleus | Synonyms: nucleated |
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| (verb) form into a nucleus | - |
| nucleated | (adjective) having a nucleus or occurring in the nucleus | Synonyms: nucleate |
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| nucleole | (noun) a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis | Synonyms: nucleolus |
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| nucleolus | (noun) a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis | Synonyms: nucleole |
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| nucleon | (noun) a constituent (proton or neutron) of an atomic nucleus | - |
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| nucleonics | (noun) the branch of physics that studies the internal structure of atomic nuclei | Synonyms: atomic physics, nuclear physics |
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| nucleoplasm | (noun) the protoplasm that constitutes the nucleus of a cell | Synonyms: karyoplasm |
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| nucleoprotein | (noun) any of several substances found in the nuclei of all living cells; consists of a protein bound to a nucleic acid | - |
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| nucleoside | (noun) a glycoside formed by partial hydrolysis of a nucleic acid | - |
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| nucleosynthesis | (noun) (astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom | - |
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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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| nucleus | (noun) a part of the cell containing DNA and RNA and responsible for growth and reproduction | Synonyms: cell nucleus, karyon |
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| (noun) any histologically identifiable mass of neural cell bodies in the brain or spinal cord | - |
| (noun) the central structure of the lens that is surrounded by the cortex | Synonyms: lens nucleus |
| (noun) a small group of indispensable persons or things | Synonyms: core, core group |
| (noun) the positively charged dense center of an atom | - |
| (noun) (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail | - |
| obstacle | (noun) an obstruction that stands in the way (and must be removed or surmounted or circumvented) | - |
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| (noun) something immaterial that stands in the way and must be circumvented or surmounted | Synonyms: obstruction |
| oligonucleotide | (noun) (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides | Synonyms: oligo |
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| oracle | (noun) a shrine where an oracular god is consulted | - |
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| (noun) a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible | - |
| (noun) an authoritative person who divines the future | Synonyms: prophesier, prophet, seer, vaticinator |
| ossicle | (noun) a small bone; especially one in the middle ear | Synonyms: bonelet, ossiculum |
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| osteosclerosis | (noun) abnormal hardening or eburnation of bone | - |
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| otosclerosis | (noun) hereditary disorder in which ossification of the labyrinth of the inner ear causes tinnitus and eventual deafness | - |
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| panicle | (noun) compound raceme or branched cluster of flowers | - |
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| panicled | (adjective) having panicles; occurring in panicles | - |
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| papulovesicle | (noun) a papule that changes into a blister | Synonyms: vesicopapule |
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| particle | (noun) a function word that can be used in English to form phrasal verbs | - |
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| (noun) a body having finite mass and internal structure but negligible dimensions | Synonyms: subatomic particle |
| (noun) (nontechnical usage) a tiny piece of anything | Synonyms: atom, corpuscle, molecule, mote, speck |
| pedicle | (noun) a small stalk bearing a single flower of an inflorescence; an ultimate division of a common peduncle | Synonyms: pedicel |
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| peduncle | (noun) a bundle of myelinated neurons joining different parts of the brain | Synonyms: cerebral peduncle |
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| (noun) stalk bearing an inflorescence or solitary flower | - |
| (noun) the thin process of tissue that attaches a polyp to the body | - |
| pellicle | (noun) thin protective membrane in some protozoa | - |
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| pentacle | (noun) a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon | Synonyms: pentagram, pentangle |
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| pinnacle | (noun) (architecture) a slender upright spire at the top of a buttress or tower | - |
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| (noun) a lofty peak | - |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, summit, superlative, tiptop, top |
| (verb) raise on or as if on a pinnacle | - |
| (verb) surmount with a pinnacle | - |
| pinocle | (noun) a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist | Synonyms: bezique, penuchle, pinochle |
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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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| popsicle | (noun) ice cream or water ice on a small wooden stick | Synonyms: ice lolly, lollipop, lolly |
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| pronucleus | (noun) the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote | - |
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| quasiparticle | (noun) a quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle | - |
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| radicle | (noun) (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve) | - |
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| receptacle | (noun) a container that is used to put or keep things in | - |
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| (noun) an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert | - |
| (noun) enlarged tip of a stem that bears the floral parts | - |
| recycle | (verb) use again after processing | Synonyms: reprocess, reuse |
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| (verb) cause to repeat a cycle | - |