| abdicator | (noun) one who formally relinquishes an office or responsibility | - |
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| adjudicator | (noun) a person who studies and settles conflicts and disputes | - |
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| adjudicatory | (adjective) concerned with adjudicating | Synonyms: adjudicative |
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| advocator | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocate, exponent, proponent |
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| allocator | (noun) a person with authority to allot or deal out or apportion | Synonyms: distributor |
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| applicator | (noun) a device for applying a substance | Synonyms: applier |
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| applicatory | (adjective) readily applicable or practical | Synonyms: applicative |
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| authenticator | (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: appraiser |
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| catoptric | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptrical |
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| catoptrical | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptric |
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| catoptrics | (noun) branch of optics dealing with formation of images by mirrors | - |
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| catostomid | (noun) a cypriniform fish of the family Catostomidae | - |
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| certificatory | (adjective) serving to certify or endorse authoritatively | - |
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| classificatory | (adjective) relating to or involving classification | - |
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| communicator | (noun) a person who communicates with others | - |
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| communicatory | (adjective) able or tending to communicate | Synonyms: communicative |
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| defalcator | (noun) someone who violates a trust by taking (money) for his own use | Synonyms: embezzler, peculator |
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| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
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| (noun) a person who defecates | Synonyms: shitter, voider |
| deprecatory | (adjective) tending to diminish or disparage | Synonyms: belittling, deprecating, deprecative, depreciative, depreciatory, slighting |
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| duplicator | (noun) apparatus that makes copies of typed, written or drawn material | Synonyms: copier |
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| educator | (noun) someone who educates young people | Synonyms: pedagog, pedagogue |
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| equivocator | (noun) a respondent who avoids giving a clear direct answer | Synonyms: hedger, tergiversator |
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| eradicator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: exterminator, terminator |
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| fabricator | (noun) someone who tells lies | Synonyms: fibber, storyteller |
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| fornicator | (noun) someone who commits adultery or fornication | Synonyms: adulterer |
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| hecatomb | (noun) a great sacrifice; an ancient Greek or Roman sacrifice of 100 oxen | - |
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| indicator | (noun) a device for showing the operating condition of some system | - |
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| (noun) a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time | Synonyms: index, index number, indicant |
| (noun) a signal for attracting attention | - |
| (noun) (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction | - |
| indicatory | (adjective) (usually followed by `of') pointing out or revealing clearly | Synonyms: indicative, revelatory, significative, suggestive |
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| judicatory | (noun) the system of law courts that administer justice and constitute the judicial branch of government | Synonyms: judicature, judicial system, judiciary |
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| justificatory | (adjective) attempting to justify or defend in speech or writing | Synonyms: defensive, justificative |
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| (adjective) providing justification | Synonyms: justificative, vindicatory |
| locator | (noun) a person who fixes the boundaries of land claims | Synonyms: locater |
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| lubricator | (noun) a substance capable of reducing friction by making surfaces smooth or slippery | Synonyms: lube, lubricant, lubricating substance |
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| piscatorial | (adjective) relating to or characteristic of the activity of fishing | Synonyms: piscatory |
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| piscatory | (adjective) relating to or characteristic of the activity of fishing | Synonyms: piscatorial |
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| pizzicato | (adjective) (of instruments in the violin family) to be plucked with the finger | - |
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| (noun) a note or passage that is played pizzicato | - |
| (adverb) with a light plucking staccato sound | - |
| placatory | (adjective) intended to pacify by acceding to demands or granting concessions | Synonyms: appeasing, placating, placative |
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| precatory | (adjective) expressing entreaty or supplication | Synonyms: precative |
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| predicator | (noun) an expression that predicates | - |
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| prevaricator | (noun) a person who has lied or who lies repeatedly | Synonyms: liar |
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| prognosticator | (noun) someone who makes predictions of the future (usually on the basis of special knowledge) | Synonyms: forecaster, predictor, soothsayer |
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| purificator | (noun) a white linen cloth which is used to wipe the chalice after each communicant partakes. | Synonyms: emunctorium, purificatorium |
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| purificatorium | (noun) a white linen cloth which is used to wipe the chalice after each communicant partakes. | Synonyms: emunctorium, purificator |
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| reciprocatory | (adjective) moving alternately backward and forward | Synonyms: reciprocative |
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| (adjective) given or done or owed to each other | Synonyms: reciprocative |
| scatological | (adjective) dealing pruriently with excrement and excretory functions | - |
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| scatology | (noun) (medicine) the chemical analysis of excrement (for medical diagnosis or for paleontological purposes) | - |
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| (noun) a preoccupation with obscenity (especially that dealing with excrement or excretory functions) | - |
| scatophagy | (noun) the eating of excrement or other filth | - |
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| spiccato | (noun) bowing in such a way that the bow bounces lightly off the strings | Synonyms: spiccato bowing |
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| staccato | (adjective) (music) marked by or composed of disconnected parts or sounds; cut short crisply | Synonyms: disconnected |
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| (adverb) separating the notes; in music | - |
| supplicatory | (adjective) humbly entreating | Synonyms: suppliant, supplicant |
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| syndicator | (noun) a businessman who forms a syndicate | - |
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| trafficator | (noun) a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn | Synonyms: blinker, turn indicator, turn signal |
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| verificatory | (adjective) serving to support or corroborate | Synonyms: collateral, confirmative, confirmatory, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verifying |
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| vesicatory | (adjective) causing blisters | Synonyms: vesicant |
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| (noun) a chemical agent that causes blistering (especially mustard gas) | Synonyms: vesicant |
| vindicator | (noun) a person who argues to defend or justify some policy or institution | Synonyms: apologist, justifier |
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| vindicatory | (adjective) providing justification | Synonyms: justificative, justificatory |
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| (adjective) given or inflicted in requital according to merits or deserts | Synonyms: retributive, retributory |
| (adjective) of or relating to or having the nature of retribution | Synonyms: retaliative, retaliatory, retributive, retributory |