| interactive | (adjective) used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more) | Synonyms: synergistic |
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| (adjective) capable of acting on or influencing each other | Synonyms: interactional |
| intractability | (noun) the trait of being hard to influence or control | Synonyms: intractableness |
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| intractable | (adjective) not tractable; difficult to manage or mold | - |
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| intractableness | (noun) the trait of being hard to influence or control | Synonyms: intractability |
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| intractably | (adverb) in an intractable manner | - |
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| malpractice | (noun) a wrongful act that the actor had no right to do; improper professional conduct | - |
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| (noun) professional wrongdoing that results in injury or damage | - |
| nonprotractile | (adjective) not extensile | Synonyms: inextensible, nonextensile |
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| nonretractable | (adjective) not capable of being retracted | Synonyms: nonretractile |
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| nonretractile | (adjective) not capable of being retracted | Synonyms: nonretractable |
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| overact | (verb) exaggerate one's acting | Synonyms: ham, ham it up, overplay |
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| overacting | (noun) poor acting by a ham actor | Synonyms: hamming |
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| overactive | (adjective) more active than normal | Synonyms: hyperactive |
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| overactivity | (noun) excessive activity | - |
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| practicability | (noun) the quality of being usable | Synonyms: practicableness |
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| practicable | (adjective) capable of being done with means at hand and circumstances as they are | Synonyms: executable, feasible, viable, workable |
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| (adjective) usable for a specific purpose | Synonyms: operable |
| practicableness | (noun) the quality of being usable | Synonyms: practicability |
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| practicably | (adverb) in a practicable manner; so as to be feasible | Synonyms: feasibly |
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| practical | (adjective) concerned with actual use or practice | - |
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| (adjective) having or put to a practical purpose or use | - |
| (adjective) guided by practical experience and observation rather than theory | Synonyms: hard-nosed, hardheaded, pragmatic |
| (adjective) being actually such in almost every respect | Synonyms: virtual |
| practicality | (noun) concerned with actual use rather than theoretical possibilities | - |
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| practically | (adverb) almost; nearly | - |
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| (adverb) in a practical manner | - |
| (adverb) (degree adverb used before a noun phrase) for all practical purposes but not completely | Synonyms: much |
| practice | (noun) a customary way of operation or behavior | Synonyms: pattern |
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| (noun) systematic training by multiple repetitions | Synonyms: drill, exercise, practice session, recitation |
| (noun) the exercise of a profession | - |
| (noun) translating an idea into action | Synonyms: praxis |
| (noun) knowledge of how something is usually done | - |
| (verb) learn by repetition | Synonyms: drill, exercise, practise |
| (verb) engage in a rehearsal (of) | Synonyms: practise, rehearse |
| (verb) carry out or practice; as of jobs and professions | Synonyms: do, exercise, practise |
| (verb) avail oneself to | Synonyms: apply, use |
| (verb) engage in or perform | Synonyms: commit |
| practiced | (adjective) skillful after much practice | Synonyms: practised |
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| (adjective) having or showing knowledge and skill and aptitude | Synonyms: adept, expert, good, proficient, skilful, skillful |
| practician | (noun) someone who practices a learned profession | Synonyms: practitioner |
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| practise | (verb) learn by repetition | Synonyms: drill, exercise, practice |
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| (verb) engage in a rehearsal (of) | Synonyms: practice, rehearse |
| (verb) carry out or practice; as of jobs and professions | Synonyms: do, exercise, practice |
| practised | (adjective) skillful after much practice | Synonyms: practiced |
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| practitioner | (noun) someone who practices a learned profession | Synonyms: practician |
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| protract | (verb) lengthen in time; cause to be or last longer | Synonyms: draw out, extend, prolong |
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| protracted | (adjective) relatively long in duration; tediously protracted | Synonyms: drawn-out, extended, lengthy, prolonged |
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| protractedly | (adverb) in a slow, leisurely or prolonged way | Synonyms: lingeringly |
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| protractible | (adjective) able to be extended | Synonyms: protractile |
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| protractile | (adjective) able to be extended | Synonyms: protractible |
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| protraction | (noun) the act of prolonging something | Synonyms: lengthening, perpetuation, prolongation |
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| (noun) the consequence of being lengthened in duration | Synonyms: continuation, lengthiness, prolongation |
| protractor | (noun) drafting instrument used to draw or measure angles | - |
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| refract | (verb) determine the refracting power of (a lens) | - |
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| (verb) subject to refraction | - |
| refractile | (adjective) of or relating to or capable of refraction | Synonyms: refractive |
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| refraction | (noun) the amount by which a propagating wave is bent | Synonyms: deflection, deflexion |
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| (noun) the change in direction of a propagating wave (light or sound) when passing from one medium to another | - |
| refractive | (adjective) of or relating to or capable of refraction | Synonyms: refractile |
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| (adjective) capable of changing the direction (of a light or sound wave) | Synonyms: deflective |
| refractiveness | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractivity |
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| refractivity | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractiveness |
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| refractometer | (noun) measuring instrument for measuring the refractive index of a substance | - |
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| refractoriness | (noun) the trait of being unmanageable | Synonyms: recalcitrance, recalcitrancy, unmanageableness |
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| refractory | (adjective) stubbornly resistant to authority or control | Synonyms: fractious, recalcitrant |
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| (adjective) temporarily unresponsive or not fully responsive to a process or stimulus | - |
| (adjective) not responding to treatment | Synonyms: stubborn |
| (noun) lining consisting of material with a high melting point; used to line the inside walls of a furnace | Synonyms: furnace lining |
| refracture | (verb) break (a bone) that was previously broken but mended in an abnormal way | - |
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| retract | (verb) formally reject or disavow a formerly held belief, usually under pressure | Synonyms: abjure, forswear, recant, resile |
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| (verb) pull inward or towards a center | Synonyms: draw in |
| (verb) use a surgical instrument to hold open (the edges of a wound or an organ) | Synonyms: draw back, pull back |
| (verb) pull away from a source of disgust or fear | Synonyms: shrink back |
| retractable | (adjective) capable of being retracted | - |
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| retracted | (adjective) drawn back and in | - |
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| retractile | (adjective) capable of retraction; capable of being drawn back | - |
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| retraction | (noun) the act of pulling or holding or drawing a part back | - |
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| (noun) a disavowal or taking back of a previous assertion | Synonyms: abjuration, recantation |
| retractor | (noun) surgical instrument that holds back the edges of a surgical incision | - |
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| semiabstract | (adjective) characterized by stylized but recognizable subject matter | - |
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| subcontract | (noun) a contract assigning to another party some obligations of a prior contract | - |
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| (verb) work under a subcontract; engage in a subcontract | - |
| (verb) arranged for contracted work to be done by others | Synonyms: farm out, job |
| subcontractor | (noun) someone who enters into a subcontract with the primary contractor | - |
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| subtract | (verb) take off or away | - |
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| (verb) make a subtraction | Synonyms: deduct, take off |
| subtracter | (noun) a machine that subtracts numbers | - |
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| (noun) a person who subtracts numbers | - |
| subtraction | (noun) the act of subtracting (removing a part from the whole) | Synonyms: deduction |
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| (noun) an arithmetic operation in which the difference between two numbers is calculated | Synonyms: minus |
| subtractive | (adjective) constituting or involving subtraction | - |
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| subtractor | (noun) An electronic logic circuit for calculating the difference between two binary numbers. | - |
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| tesseract | (noun) the four-dimensional analogue of a cube | - |
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| tract | (noun) a bundle of myelinated nerve fibers following a path through the brain | Synonyms: nerve pathway, nerve tract, pathway |
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| (noun) a system of body parts that together serve some particular purpose | - |
| (noun) a brief treatise on a subject of interest; published in the form of a booklet | Synonyms: pamphlet |
| (noun) an extended area of land | Synonyms: parcel, parcel of land, piece of ground, piece of land |
| tractability | (noun) the trait of being easily persuaded | Synonyms: flexibility, tractableness |
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| tractable | (adjective) easily managed (controlled or taught or molded) | Synonyms: manipulable |
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| (adjective) responsive to suggestions and influences | Synonyms: amenable |
| tractableness | (noun) the trait of being easily persuaded | Synonyms: flexibility, tractability |
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| tractile | (adjective) capable of being shaped or bent or drawn out | Synonyms: ductile, malleable, pliable, pliant, tensile |
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| traction | (noun) (orthopedics) the act of pulling on a bone or limb (as in a fracture) to relieve pressure or align parts in a special way during healing | - |
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| (noun) the friction between a body and the surface on which it moves (as between an automobile tire and the road) | Synonyms: adhesive friction, grip |
| tractive | (adjective) exerting traction and serving to pull | - |
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| tractor | (noun) a wheeled vehicle with large wheels; used in farming and other applications | - |
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| (noun) a truck that has a cab but no body; used for pulling large trailers or vans | - |
| unattractive | (adjective) lacking beauty or charm | - |
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| (adjective) lacking power to arouse interest | - |
| (adjective) not appealing to the senses | Synonyms: untempting |
| unattractively | (adverb) in an unattractive manner | - |
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| unattractiveness | (noun) an ugliness of appearance that is not appealing to viewers | - |
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| uncharacteristic | (adjective) distinctive and not typical | - |
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| uncharacteristically | (adverb) in uncharacteristic manner | - |
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| underact | (verb) act (a role) with great restraint | Synonyms: underplay |
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| underactive | (adjective) abnormally inactive | Synonyms: hypoactive |
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| unpracticed | (adjective) not having had extensive practice | Synonyms: unpractised, unversed |
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| unpractised | (adjective) not having had extensive practice | Synonyms: unpracticed, unversed |
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