| ANORTHOSITE | • anorthosite n. (Petrology) A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar. • ANORTHOSITE n. an igneous rock that consists of 90 or more percent of plagioclase feldspar, typically labradorite. | 
| ANTHEROZOID | • antherozoid n. (Botany) One of the mobile male reproductive bodies in the antheridia of cryptogams. • ANTHEROZOID n. a motile male gamete produced in an antheridium, also ANTHEROZOOID. | 
| ANTIHORMONE | • antihormone n. (Biochemistry) Any material that counteracts the effects of a hormone. | 
| BOTHERATION | • botheration interj. A mild expression of annoyance or exasperation: bother! • botheration n. (Uncountable) The state of being bothered; annoyance, vexation. • botheration n. (Countable) An act of bothering or annoying. | 
| CHOCOLATIER | • chocolatier adj. Comparative form of chocolatey: more chocolatey. • chocolatier adj. Comparative form of chocolaty: more chocolaty. • chocolatier n. A producer of chocolate. | 
| COHORTATIVE | • cohortative adj. (Grammar, of a verb) Inflected to express plea, insistence, imploring, self-encouragement, wish, desire… • cohortative adj. Encouraging. • cohortative n. (Grammar) The cohortative mood. | 
| DEHORTATION | • dehortation n. (Archaic) Advice against something; dissuasion. • DEHORTATION n. advice against something, dissuasion. | 
| EROTOPHOBIA | • erotophobia n. Fear of sex; negative attitudes towards sex. • EROTOPHOBIA n. fear of sex. | 
| EXHORTATION | • exhortation n. The act or practice of exhorting; the act of inciting to laudable deeds; incitement to that which is… • exhortation n. Language intended to incite and encourage. • EXHORTATION n. an act or instance of exhorting. | 
| HETEROTOPIA | • heterotopia n. (Pathology) Normal tissue (or an organ) present at an abnormal part of the body. • heterotopia n. (Ecology) The occurrence of an organism in a number of different habitats. • heterotopia n. (Philosophy, literary criticism) A space which is alien to what is normal within the society, variably… | 
| OPHIOLATERS | • ophiolaters n. Plural of ophiolater. • OPHIOLATER n. a snake-worshipper. | 
| ORTHOCAINES | • orthocaines n. Plural of orthocaine. • ORTHOCAINE n. a white crystalline substance used as a local anaesthetic. | 
| ORTHOEPICAL | • orthoepical adj. Synonym of orthoepic. • ORTHOEPICAL adj. relating to orthoepy, the study of correct pronunciation, also ORTHOEPIC. | 
| ORTHOPAEDIC | • orthopaedic adj. Alternative spelling of orthopedic. • orthopædic adj. Alternative spelling of orthopedic. • ORTHOPAEDIC adj. relating to orthopaedics, also ORTHOPAEDICAL, ORTHOPEDIC. | 
| ORTHOPEDIAS | • ORTHOPEDIA n. the art or process of curing deformities arising from (originally childhood) disease or injury, also ORTHOPAEDICS, ORTHOPAEDY, ORTHOPEDICS, ORTHOPEDY. | 
| ORTHOREXIAS | • ORTHOREXIA n. an eating disorder characterized by excessive focus on eating healthy foods. | 
| WAITERHOODS | • WAITERHOOD n. the state of being a waiter. |