| ANTIQUARY | • antiquary n. A person who is knowledgeable of, or who collects antiques; an antiquarian. • antiquary n. An aficionado or student of antiquities, ancient artifacts, historic sites, ancient writings, or things of the past. • antiquary adj. Relating to antiquity. | 
| EQUATIONALLY | • equationally adv. In terms of equations. • EQUATIONAL adv. relating to an equation. | 
| EQUIANGULARITY | • equiangularity n. The condition of being equiangular. • EQUIANGULARITY n. the state of being equiangular. | 
| INADEQUACY | • inadequacy n. The state of being inadequate. • inadequacy n. A shortage of required material. • inadequacy n. A lack of competence or ability. | 
| INADEQUATELY | • inadequately adv. In an inadequate manner. • INADEQUATE adv. not adequate. | 
| QUADRANGULARLY | • quadrangularly adv. In a quadrangular shape or manner. • QUADRANGULAR adv. like a quadrangle. | 
| QUADRAPHONY | • quadraphony n. (Of a sound system) Sound originating from four speakers. • QUADRAPHONY n. a system of sound transmission using four speakers, also QUADRAPHONICS, QUADRIPHONICS, QUADROPHONICS, QUADROPHONY. | 
| QUADRENNIALLY | • quadrennially adv. Every four years. • QUADRENNIAL adv. lasting four years; occurring once every four years. | 
| QUADRINGENARY | • quadringenary n. (Rare) A quatercentenary. • QUADRINGENARY n. a four-hundredth anniversary or its celebration. | 
| QUADRIVALENCY | • quadrivalency n. Synonym of quadrivalence. • QUADRIVALENCY n. the state of being quadrivalent, also QUADRIVALENCE. | 
| QUAESTIONARY | • quæstionary n. Rare spelling of questionary. • QUAESTIONARY n. (Scott) a religious pardoner, also QUESTIONARY. | 
| QUANDARY | • quandary n. A state of not knowing what to decide; a state of difficulty or perplexity; a state of uncertainty… • quandary n. A dilemma, a difficult decision or choice. • QUANDARY n. a state of perplexity. | 
| QUANGOCRACY | • quangocracy n. Rule by quangos or similar unelected bodies. • QUANGOCRACY n. government by quango. | 
| QUANTALLY | • QUANTAL adv. of or pertaining to a quantum. | 
| QUANTITATIVELY | • quantitatively adv. In a quantitative manner. • quantitatively adv. With respect to quantity rather than quality. • QUANTITATIVE adv. estimable according to quantity, also QUANTITIVE. | 
| QUARRYMAN | • quarryman n. A man involved in quarrying (mining for stone). • QUARRYMAN n. a quarry worker. | 
| QUATERCENTENARY | • quatercentenary n. A four-hundredth anniversary. • QUATERCENTENARY n. a four-hundredth anniversary. | 
| QUATERNARY | • quaternary adj. Of fourth rank or order. • quaternary adj. Of a mathematical expression containing e.g. x4. • quaternary adj. Relating to or in number base four. | 
| UNQUANTIFIABLY | • unquantifiably adv. In a way that cannot be quantified. |