| BOUDOIR | • boudoir n. A woman’s private sitting room, dressing room, or bedroom. • BOUDOIR n. (French) a woman's bedroom. |
| BOURDON | • bourdon n. (Music, archaic) The burden or bass of a melody. • bourdon n. The drone pipe of a bagpipe. • bourdon n. The lowest-pitched stop of an organ. |
| DOLOURS | • dolours n. Plural of dolour. • DOLOUR n. grief, also DOLOR. |
| DORTOUR | • dortour n. Alternative form of dorter. • DORTOUR n. (archaic) a dormitory, also DORTER. |
| DROPOUT | • dropout n. Someone who has left an educational institution without completing the course. • dropout n. Someone who has opted out of conventional society. • dropout n. One who suddenly leaves anything, or the act of doing so. |
| MUDROOM | • mudroom n. (North America) A room used as a barrier between outdoors and indoors. • mud␣room n. Alternative spelling of mudroom. • MUDROOM n. a room for shedding muddy clothing. |
| ODORFUL | • odorful adj. Odorous. • ODORFUL adj. strong smelling, also ODOURFUL. |
| ODOROUS | • odorous adj. Having a distinctive odor. • ODOROUS adj. having an odor. |
| ODOURED | • odoured adj. Alternative form of odored. • ODOURED adj. having an odour. |
| OROTUND | • orotund adj. Characterized by fullness, clarity, strength, and smoothness of sound. • orotund adj. Pompous; bombastic. • OROTUND adj. marked by fullness and clarity of sound; pompous. |
| OUTDOER | • outdoer n. One who, or that which, outdoes. • OUTDOER n. one who outdoes. |
| OUTDOOR | • outdoor adj. Situated in, designed to be used in, or carried on in the open air. • outdoor adj. Pertaining to charity administered or received away from, or independently from, a workhouse or other institution. • outdoor v. (In some African communities) To publicly display a child after it has been named. |
| OUTDROP | • OUTDROP v. to surpass in dropping. |
| OUTRODE | • outrode v. Simple past tense of outride. • outrode n. Obsolete form of outroad. • OUTRIDE v. to ride faster than. |
| RHODOUS | • RHODOUS adj. of rhodium in lower valency. |
| UPHOORD | • UPHOORD v. (Shakespeare) to hoard up. |
| UROPODS | • uropods n. Plural of uropod. • UROPOD n. any one of the abdominal appendages of a crustacean, esp. one of the posterior ones. |