| instructorship | (noun) the position of instructor | - |
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| instructress | (noun) a woman instructor | - |
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| instrument | (noun) the means whereby some act is accomplished | Synonyms: tool |
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| (noun) a device that requires skill for proper use | - |
| (noun) any of various devices or contrivances that can be used to produce musical tones or sounds | Synonyms: musical instrument |
| (noun) (law) a document that states some contractual relationship or grants some right | Synonyms: legal document, legal instrument, official document |
| (noun) the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process | Synonyms: instrumental role |
| (noun) a person used by another to gain an end | Synonyms: cat's-paw, pawn |
| (verb) address a legal document to | - |
| (verb) write an instrumental score for | Synonyms: instrumentate |
| (verb) equip with instruments for measuring, recording, or controlling | - |
| instrumental | (adjective) relating to or designed for or performed on musical instruments | - |
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| (adjective) serving or acting as a means or aid | Synonyms: implemental, subservient |
| instrumentalism | (noun) a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success | - |
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| instrumentalist | (noun) someone who plays a music as a profession | Synonyms: musician, player |
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| instrumentality | (noun) an artifact (that is instrumental in accomplishing some end) for accomplishing some end | Synonyms: instrumentation, means |
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| (noun) the quality of being instrumental for some purpose | - |
| (noun) a subsidiary organ of government created for a special purpose | - |
| instrumentate | (verb) write an instrumental score for | Synonyms: instrument |
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| instrumentation | (noun) the act of providing or using the instruments needed for some implementation | - |
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| (noun) the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments | Synonyms: orchestration |
| (noun) an artifact (that is instrumental in accomplishing some end) for accomplishing some end | Synonyms: instrumentality, means |
| (noun) the instruments called for in a musical score or arrangement for a band or orchestra | - |
| insubordinate | (adjective) not submissive to authority | - |
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| (adjective) disposed to or engaged in defiance of established authority | Synonyms: resistant, resistive |
| insubordination | (noun) an insubordinate act | Synonyms: rebelliousness |
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| (noun) defiance of authority | - |
| insubstantial | (adjective) lacking material form or substance; unreal | Synonyms: unreal, unsubstantial |
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| (adjective) lacking in nutritive value | - |
| (adjective) lacking solidity or strength | Synonyms: flimsy |
| insubstantiality | (noun) lacking substance or reality | - |
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| (noun) lack of solid substance and strength | - |
| insubstantially | (adverb) not substantially; lacking substantial expression or fullness | Synonyms: impalpably |
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| insufferable | (adjective) unbearably arrogant or conceited | - |
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| (adjective) too extreme to bear | Synonyms: unsufferable |
| insufferably | (adverb) in an extremely arrogant or conceited manner | - |
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| (adverb) to an insufferable degree | Synonyms: unsufferably |
| insufficiency | (noun) lack of an adequate quantity or number | Synonyms: deficiency, inadequacy |
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| (noun) (pathology) inability of a bodily part or organ to function normally | - |
| (noun) a lack of competence | Synonyms: inadequacy |
| insufficient | (adjective) of a quantity not able to fulfill a need or requirement | Synonyms: deficient |
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| insufficiently | (adverb) to an insufficient degree | - |
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| insufflate | (verb) blow or breathe hard on or into | - |
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| (verb) treat by blowing a powder or vapor into a bodily cavity | - |
| (verb) breathe or blow onto as a ritual or sacramental act, especially so as to symbolize the action of the Holy Spirit | - |
| insufflation | (noun) an act of blowing or breathing on or into something | - |
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| (noun) (medicine) blowing air or medicated powder into the lungs (or into some other body cavity) | - |
| insulant | (noun) insulating material that reduces or prevents the transmission of heat or sound or electricity | Synonyms: insulation |
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| insular | (adjective) relating to or characteristic of or situated on an island | - |
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| (adjective) suggestive of the isolated life of an island | - |
| (adjective) narrowly restricted in outlook or scope | Synonyms: parochial |
| insularism | (noun) the state of being isolated or detached | Synonyms: detachment, insularity, insulation |
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| insularity | (noun) the state of being isolated or detached | Synonyms: detachment, insularism, insulation |
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| insulate | (verb) place or set apart | Synonyms: isolate |
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| (verb) protect from heat, cold, or noise by surrounding with insulating material | - |
| insulation | (noun) the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity | - |
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| (noun) the state of being isolated or detached | Synonyms: detachment, insularism, insularity |
| (noun) insulating material that reduces or prevents the transmission of heat or sound or electricity | Synonyms: insulant |
| insulator | (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity | Synonyms: dielectric, nonconductor |
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| insulin | (noun) hormone secreted by the isles of Langerhans in the pancreas; regulates storage of glycogen in the liver and accelerates oxidation of sugar in cells | - |
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| insult | (noun) a deliberately offensive act or something producing the effect of deliberate disrespect | Synonyms: affront |
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| (noun) a rude expression intended to offend or hurt | Synonyms: abuse, contumely, revilement, vilification |
| (verb) treat, mention, or speak to rudely | Synonyms: affront, diss |
| insulting | (adjective) expressing extreme contempt | Synonyms: contemptuous, disdainful, scornful |
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| insultingly | (adverb) in an unfair and insulting manner | Synonyms: foully |
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| (adverb) in a disrespectful and insulting manner | - |
| insuperable | (adjective) incapable of being surmounted or excelled | Synonyms: unconquerable |
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| (adjective) impossible to surmount | Synonyms: insurmountable |
| insuperably | (adverb) to an insuperable degree | - |
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| insupportable | (adjective) incapable of being justified or explained | Synonyms: indefensible, unjustifiable, unwarrantable, unwarranted |
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| insurability | (noun) the quality of being insurable; the conditions under which an insurance company will issue insurance to an applicant (based on standards set by the insurance company) | - |
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| insurable | (adjective) capable of being insured or eligible to be insured | - |
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| insurance | (noun) written contract or certificate of insurance | Synonyms: insurance policy, policy |
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| (noun) promise of reimbursement in the case of loss; paid to people or companies so concerned about hazards that they have made prepayments to an insurance company | - |
| (noun) protection against future loss | Synonyms: indemnity |
| insure | (verb) be careful or certain to do something; make certain of something | Synonyms: ascertain, assure, check, control, ensure, see, see to it |
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| (verb) protect by insurance | Synonyms: cover, underwrite |
| (verb) make certain of | Synonyms: assure, ensure, guarantee, secure |
| (verb) take out insurance for | - |
| insured | (adjective) covered by insurance | - |
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| (noun) a person whose interests are protected by an insurance policy; a person who contracts for an insurance policy that indemnifies him against loss of property or life or health etc. | Synonyms: insured person |
| insurer | (noun) a financial institution that sells insurance | Synonyms: insurance company, insurance firm, insurance underwriter, underwriter |
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| insurgence | (noun) an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict | Synonyms: insurgency |
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| insurgency | (noun) an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict | Synonyms: insurgence |
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| insurgent | (adjective) in opposition to a civil authority or government | Synonyms: seditious, subversive |
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| (noun) a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions) | Synonyms: freedom fighter, insurrectionist, rebel |
| (noun) a member of an irregular armed force that fights a stronger force by sabotage and harassment | Synonyms: guerilla, guerrilla, irregular |
| insurmountable | (adjective) not capable of being surmounted or overcome | Synonyms: unsurmountable |
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| (adjective) impossible to surmount | Synonyms: insuperable |
| insurrection | (noun) organized opposition to authority; a conflict in which one faction tries to wrest control from another | Synonyms: rebellion, revolt, rising, uprising |
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| insurrectional | (adjective) of or relating to or given to insurrection | Synonyms: insurrectionary |
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| insurrectionary | (adjective) of or relating to or given to insurrection | Synonyms: insurrectional |
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| insurrectionism | (noun) the principle of revolt against constituted authority | - |
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| insurrectionist | (noun) a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions) | Synonyms: freedom fighter, insurgent, rebel |
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| insusceptible | (adjective) not susceptible to | Synonyms: unsusceptible |
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| intrinsic | (adjective) belonging to a thing by its very nature | Synonyms: intrinsical |
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| (adjective) situated within or belonging solely to the organ or body part on which it acts | - |
| intrinsical | (adjective) belonging to a thing by its very nature | Synonyms: intrinsic |
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| intrinsically | (adverb) with respect to its inherent nature | Synonyms: in and of itself, per se |
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| kinsfolk | (noun) people descended from a common ancestor | Synonyms: family, family line, folk, kinfolk, phratry, sept |
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| kinship | (noun) (anthropology) relatedness or connection by blood or marriage or adoption | Synonyms: family relationship, relationship |
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| (noun) a close connection marked by community of interests or similarity in nature or character | Synonyms: affinity |
| kinsman | (noun) a male relative | - |
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| kinsperson | (noun) a person having kinship with another or others | Synonyms: family, kin |
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| kinswoman | (noun) a female relative | - |
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| linseed | (noun) the seed of flax used as a source of oil | Synonyms: flaxseed |
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| linstock | (noun) a stick about a meter long with a point on one end (to stick in the ground) and a forked head on the other end (to hold a lighted match); formerly used to fire cannons | - |
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| loins | (noun) the lower part of the abdomen just above the external genital organs | Synonyms: pubes, pubic region |
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| (noun) the region of the hips and groin and lower abdomen | - |
| mainsail | (noun) the lowermost sail on the mainmast | - |
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| mainsheet | (noun) (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind | Synonyms: sheet, shroud, tack, weather sheet |
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| mainspring | (noun) the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism | - |
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| mainstay | (noun) the forestay that braces the mainmast | - |
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| (noun) a central cohesive source of support and stability | Synonyms: anchor, backbone, keystone, linchpin, lynchpin |
| (noun) a prominent supporter | Synonyms: pillar |
| mainstream | (noun) the prevailing current of thought | - |
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| mainstreamed | (adjective) (of the handicapped) placed in regular school classes | - |
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| marlinspike | (noun) a pointed iron hand tool that is used to separate strands of a rope or cable (as in splicing) | Synonyms: marlinespike, marlingspike |
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| matins | (noun) the first canonical hour; at daybreak | Synonyms: morning prayer |
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| minster | (noun) any of certain cathedrals and large churches; originally connected to a monastery | - |
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| minstrel | (noun) a singer of folk songs | Synonyms: folk singer, jongleur, poet-singer, troubadour |
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| (noun) a performer in a minstrel show | - |
| (verb) celebrate by singing, in the style of minstrels | - |
| minstrelsy | (noun) the art of a minstrel | - |
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| (noun) ballads sung by minstrels | - |
| (noun) a troupe of minstrels | - |
| mountainside | (noun) the side or slope of a mountain | Synonyms: versant |
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| muggins | (noun) a person who lacks good judgment | Synonyms: fool, sap, saphead, tomfool |
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| nainsook | (noun) a soft lightweight muslin used especially for babies | - |
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| ninepins | (noun) a bowling game that is played by rolling a bowling ball down a bowling alley at a target of nine wooden pins | Synonyms: skittles |
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| noninstitutional | (adjective) not institutional | - |
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| noninstitutionalised | (adjective) not committed to an institution | Synonyms: noninstitutionalized |
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| noninstitutionalized | (adjective) not committed to an institution | Synonyms: noninstitutionalised |
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| pains | (noun) an effortful attempt to attain a goal | Synonyms: nisus, strain, striving |
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| painstaking | (adjective) characterized by extreme care and great effort | Synonyms: conscientious, scrupulous |
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| painstakingly | (adverb) in a fastidious and painstaking manner | Synonyms: fastidiously |
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| painstakingness | (noun) the trait of being painstaking and careful | Synonyms: conscientiousness |
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| peninsula | (noun) a large mass of land projecting into a body of water | - |
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| peninsular | (adjective) of or forming or resembling a peninsula | - |
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| pinscher | (noun) any of three breeds of dogs whose ears and tail are usually cropped | - |
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| pinstripe | (noun) a very thin stripe (especially a white stripe on a dark fabric) | - |
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| (noun) a fabric with very thin stripes | - |
| (noun) a suit made from a fabric with very thin stripes | - |
| pinstriped | (adjective) having very thin stripes | - |
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| plainsman | (noun) an inhabitant of a plains region (especially the Great Plains of North America) | - |
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| plainsong | (noun) (Roman Catholic Church) a liturgical chant consisting of a single, unaccompanied melodic line | Synonyms: plainchant |
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| plainspoken | (adjective) characterized by directness in manner or speech; without subtlety or evasion | Synonyms: blunt, candid, forthright, frank, free-spoken, outspoken, point-blank, straight-from-the-shoulder |
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| (adjective) using simple and direct language | - |
| poinsettia | (noun) tropical American plant having poisonous milk and showy tapering usually scarlet petallike leaves surrounding small yellow flowers | Synonyms: Christmas flower, Christmas star, Euphorbia pulcherrima, lobster plant, Mexican flameleaf, painted leaf |
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| pumpkinseed | (noun) small brilliantly colored North American sunfish | Synonyms: Lepomis gibbosus |
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| quinsy | (noun) a painful pus filled inflammation of the tonsils and surrounding tissues; usually a complication of tonsillitis | Synonyms: peritonsillar abscess |
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| rainstorm | (noun) a storm with rain | - |
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| reinstall | (verb) install again | - |
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| reinstate | (verb) restore to the previous state or rank | - |
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| (verb) bring back into original existence, use, function, or position | Synonyms: reestablish, restore |
| reinstatement | (noun) the act of restoring someone to a previous position | - |
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| (noun) the condition of being reinstated | - |
| reinsurance | (noun) sharing the risk by insurance companies; part or all of the insurer's risk is assumed by other companies in return for part of the premium paid by the insured | - |
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