| phylliform | (adjective) having the shape of a leaf | - |
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| pianoforte | (noun) a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds | Synonyms: forte-piano, piano |
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| pinafore | (noun) a sleeveless dress resembling an apron; worn over other clothing | Synonyms: jumper, pinny |
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| pisiform | (noun) a small wrist bone that articulates only with the triquetral | Synonyms: os pisiforme, pisiform bone |
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| pitchfork | (noun) a long-handled hand tool with sharp widely spaced prongs for lifting and pitching hay | - |
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| (verb) lift with a pitchfork | Synonyms: fork |
| platform | (noun) a raised horizontal surface | - |
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| (noun) any military structure or vehicle bearing weapons | Synonyms: weapons platform |
| (noun) a woman's shoe with a very high thick sole | Synonyms: chopine |
| (noun) the combination of a particular computer and a particular operating system | - |
| (noun) a long, flat raised structure of a railway station, where people get on and off of trains | - |
| (noun) a document stating the aims and principles of a political party | Synonyms: political platform, political program, program |
| preform | (verb) form or shape beforehand or determine the shape of beforehand | - |
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| (verb) form into a shape resembling the final, desired one | - |
| preformation | (noun) a theory (popular in the 18th century and now discredited) that an individual develops by simple enlargement of a tiny fully formed organism (a homunculus) that exists in the germ cell | Synonyms: theory of preformation |
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| rainforest | (noun) a forest with heavy annual rainfall | Synonyms: rain forest |
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| reenforce | (verb) make stronger | Synonyms: reinforce |
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| reenforcement | (noun) a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission | Synonyms: reinforcement, support |
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| (noun) information that makes more forcible or convincing | Synonyms: reinforcement |
| reforest | (verb) forest anew | - |
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| reforestation | (noun) the restoration (replanting) of a forest that had been reduced by fire or cutting | Synonyms: re-afforestation |
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| reforge | (verb) cast or model anew | Synonyms: recast, remodel |
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| reform | (noun) a change for the better as a result of correcting abuses | - |
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| (noun) a campaign aimed to correct abuses or malpractices | - |
| (noun) self-improvement in behavior or morals by abandoning some vice | - |
| (verb) make changes for improvement in order to remove abuse and injustices | - |
| (verb) break up the molecules of | - |
| (verb) produce by cracking | - |
| (verb) change for the better | Synonyms: see the light, straighten out |
| (verb) bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one | Synonyms: reclaim, rectify, regenerate |
| (verb) improve by alteration or correction of errors or defects and put into a better condition | - |
| reformable | (adjective) susceptible to improvement or reform | Synonyms: redeemable |
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| reformation | (noun) rescuing from error and returning to a rightful course | Synonyms: reclamation |
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| (noun) improvement (or an intended improvement) in the existing form or condition of institutions or practices etc.; intended to make a striking change for the better in social or political or religious affairs | - |
| reformative | (adjective) tending to reform | Synonyms: reformatory |
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| reformatory | (adjective) tending to reform | Synonyms: reformative |
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| (noun) correctional institution for the detention and discipline and training of young or first offenders | Synonyms: reform school, training school |
| reformed | (adjective) caused to abandon an evil manner of living and follow a good one | - |
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| reformer | (noun) an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel | - |
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| (noun) a disputant who advocates reform | Synonyms: crusader, meliorist, reformist, social reformer |
| reformism | (noun) a doctrine of reform | - |
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| reformist | (adjective) favoring or promoting reform (often by government action) | Synonyms: progressive, reform-minded |
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| (noun) a disputant who advocates reform | Synonyms: crusader, meliorist, reformer, social reformer |
| reformulate | (verb) formulate or develop again, of an improved theory or hypothesis | Synonyms: redevelop |
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| reinforce | (verb) make stronger | Synonyms: reenforce |
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| (verb) strengthen and support with rewards | Synonyms: reward |
| reinforced | (adjective) (used of soaps or cleaning agents) having a substance (an abrasive or filler) added to increase effectiveness | Synonyms: built |
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| (adjective) given added strength or support | Synonyms: strengthened |
| reinforcement | (noun) an act performed to strengthen approved behavior | Synonyms: reward |
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| (noun) a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission | Synonyms: reenforcement, support |
| (noun) a device designed to provide additional strength | Synonyms: strengthener |
| (noun) (psychology) a stimulus that strengthens or weakens the behavior that produced it | Synonyms: reinforcer, reinforcing stimulus |
| (noun) information that makes more forcible or convincing | Synonyms: reenforcement |
| reinforcer | (noun) (psychology) a stimulus that strengthens or weakens the behavior that produced it | Synonyms: reinforcement, reinforcing stimulus |
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| reniform | (adjective) (of a leaf or bean shape) resembling the shape of kidney | Synonyms: kidney-shaped |
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| rutherford | (noun) a unit strength of a radioactive source equal to one million disintegrations per second | - |
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| rutherfordium | (noun) a radioactive transuranic element which has been synthesized | Synonyms: atomic number 104, element 104, Rf, unnilquadium, Unq |
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| sagittiform | (adjective) (of a leaf shape) like an arrow head without flaring base lobes | Synonyms: arrow-shaped, sagittate |
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| salamandriform | (adjective) shaped like a salamander | - |
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| salverform | (adjective) of or concerning a gamopetalous that has a slender tube and an abruptly expanded tip | - |
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| semiformal | (adjective) moderately formal; requiring a dinner jacket | Synonyms: black-tie, semi-formal |
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| sforzando | (noun) (music) a notation written above a note and indicating that it is to be played with a strong initial attack | - |
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| (noun) an accented chord | - |
| straightforward | (adjective) pointed directly ahead | - |
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| (adjective) without evasion or compromise | Synonyms: square, straight |
| (adjective) without concealment or deception; honest | Synonyms: aboveboard |
| (adjective) free from ambiguity | - |
| straightforwardly | (adverb) with firmness and conviction; without compromise | Synonyms: foursquare, squarely |
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| straightforwardness | (noun) the quality of being direct and straightforward | Synonyms: downrightness |
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| (noun) without hypocrisy | Synonyms: singleness |
| tablefork | (noun) a fork for eating at a dining table | - |
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| thenceforth | (adverb) from that time on | Synonyms: thereafter |
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| therefor | (adverb) (in formal usage, especially legal usage) for that or for it | - |
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| therefore | (adverb) (used to introduce a logical conclusion) from that fact or reason or as a result | Synonyms: hence, so, thence, thus |
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| (adverb) as a consequence | Synonyms: consequently |
| theretofore | (adverb) up to that time | - |
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| transform | (verb) change or alter in form, appearance, or nature | Synonyms: transmute, transubstantiate |
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| (verb) change from one form or medium into another | Synonyms: translate |
| (verb) subject to a mathematical transformation | - |
| (verb) change in outward structure or looks | Synonyms: metamorphose, transmute |
| (verb) increase or decrease (an alternating current or voltage) | - |
| (verb) change (a bacterial cell) into a genetically distinct cell by the introduction of DNA from another cell of the same or closely related species | - |
| (verb) convert (one form of energy) to another | - |
| transformable | (adjective) capable of being changed in substance as if by alchemy | Synonyms: convertible, translatable, transmutable |
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| transformation | (noun) the act of changing in form or shape or appearance | Synonyms: translation |
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| (noun) (genetics) modification of a cell or bacterium by the uptake and incorporation of exogenous DNA | - |
| (noun) a rule describing the conversion of one syntactic structure into another related syntactic structure | - |
| (noun) a qualitative change | Synonyms: shift, transmutation |
| (noun) (mathematics) a function that changes the position or direction of the axes of a coordinate system | - |
| transformed | (adjective) given a completely different form or appearance | - |
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| transformer | (noun) an electrical device by which alternating current of one voltage is changed to another voltage | - |
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| umbelliform | (adjective) resembling or in the form of an umbel | - |
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| uncomfortable | (adjective) providing or experiencing physical discomfort | - |
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| (adjective) conducive to or feeling mental discomfort | - |
| uncomfortableness | (noun) embarrassment deriving from the feeling that others are critically aware of you | Synonyms: self-consciousness, uneasiness |
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| (noun) the state of being tense and feeling pain | Synonyms: discomfort |
| uncomfortably | (adverb) in physical discomfort | - |
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| unconformable | (adjective) not correspondent | - |
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| unconformist | (adjective) not conforming to some norm or socially approved pattern of behavior or thought | Synonyms: nonconformist |
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| underperform | (verb) perform too rarely | - |
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| (verb) perform less well or with less success than expected | Synonyms: underachieve |
| underperformer | (noun) a business that is less successful than expected | - |
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| (noun) a student who does not perform as well as expected or as well as the IQ indicates | Synonyms: nonachiever, underachiever |
| unenforceable | (adjective) not enforceable; not capable of being brought about by compulsion | - |
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| unenforced | (adjective) not enforced; not compelled especially by legal or police action | - |
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| unforbearing | (adjective) unwilling to endure | - |
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| unforced | (adjective) not resulting from undue effort; not forced | Synonyms: unstrained |
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| (adjective) not brought about by coercion or force | Synonyms: uncoerced, willing |
| unforceful | (adjective) lacking force; feeble | Synonyms: forceless |
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| unforeseeable | (adjective) incapable of being anticipated | - |
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| unforeseen | (adjective) not anticipated | Synonyms: out of the blue, unanticipated, unlooked-for, unseen |
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| unforesightful | (adjective) lacking foresight or scope | Synonyms: myopic, short, shortsighted |
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| unforested | (adjective) not covered with forest | - |
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| unforethoughtful | (adjective) lacking forethought | - |
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| unforfeitable | (adjective) not subject to forfeiture | Synonyms: inalienable |
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| unforgettable | (adjective) impossible to forget | - |
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| unforgettably | (adverb) in a memorable manner | Synonyms: memorably |
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| unforgivable | (adjective) not excusable | Synonyms: inexcusable |
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| unforgivably | (adverb) in an unpardonable manner or to an unpardonable degree | Synonyms: inexcusably, unpardonably |
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| unforgiving | (adjective) unwilling or unable to forgive or show mercy | - |
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| (adjective) not to be placated or appeased or moved by entreaty | Synonyms: grim, inexorable, relentless, stern, unappeasable, unrelenting |
| unforgivingly | (adverb) without forgiveness; in an unforgiving manner | - |
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| unforgivingness | (noun) The quality of having no allowance for weakness. | - |
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| unformed | (adjective) not having form or shape | - |
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| (adjective) not formed or organized | - |
| unfortunate | (adjective) not favored by fortune; marked or accompanied by or resulting in ill fortune | - |
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| (adjective) not auspicious; boding ill | Synonyms: inauspicious |
| (adjective) unsuitable or regrettable | - |
| (noun) a person who suffers misfortune | Synonyms: unfortunate person |
| unfortunately | (adverb) by bad luck | Synonyms: alas, regrettably, unluckily |
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| uniform | (adjective) always the same; showing a single form or character in all occurrences | Synonyms: unvarying |
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| (adjective) not differentiated | Synonyms: undifferentiated |
| (adjective) the same throughout in structure or composition | Synonyms: consistent |
| (adjective) evenly spaced | - |
| (noun) clothing of distinctive design worn by members of a particular group as a means of identification | - |
| (verb) provide with uniforms | - |
| uniformed | (adjective) dressed in a uniform | - |
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| uniformise | (verb) make uniform | Synonyms: uniformize |
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| uniformity | (noun) the quality of lacking diversity or variation (even to the point of boredom) | Synonyms: uniformness |
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| (noun) a condition in which everything is regular and unvarying | - |
| uniformize | (verb) make uniform | Synonyms: uniformise |
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| uniformly | (adverb) in a uniform manner | - |
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| uniformness | (noun) the quality of lacking diversity or variation (even to the point of boredom) | Synonyms: uniformity |
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| uninformative | (adjective) lacking information | - |
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| uninformatively | (adverb) in an uninformative manner | Synonyms: uninstructively |
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| uninformed | (adjective) not informed; lacking in knowledge or information | - |
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| unperformed | (adjective) not performed | - |
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| unreformable | (adjective) unrepentant and incapable of being reformed | Synonyms: unregenerate |
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| (adjective) insusceptible of reform | Synonyms: irreclaimable, irredeemable, unredeemable |
| unreformed | (adjective) unaffected by the Reformation | - |
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| varicelliform | (adjective) resembling the rash of chickenpox | - |
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| variform | (adjective) varying in form or shape | - |
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| vasiform | (adjective) constituting a tube; having hollow tubes (as for the passage of fluids) | Synonyms: cannular, tube-shaped, tubelike, tubular |
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| vermiform | (adjective) resembling a worm; long and thin and cylindrical | Synonyms: worm-shaped |
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| waveform | (noun) the shape of a wave illustrated graphically by plotting the values of the period quantity against time | Synonyms: wave form, wave shape |
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| wherefore | (noun) the cause or intention underlying an action or situation, especially in the phrase `the whys and wherefores' | Synonyms: why |
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| workforce | (noun) the force of workers available | Synonyms: hands, manpower, men, work force |
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