| HOROLOGIST | • horologist n. Someone who makes or repairs timepieces, watches or clocks. • HOROLOGIST n. one versed in horology. |
| MONOTROCHS | • monotrochs n. Plural of monotroch. • MONOTROCH n. (Scott) a wheelbarrow. |
| MOTHPROOFS | • mothproofs v. Third-person singular simple present indicative form of mothproof. • MOTHPROOF v. to proof against moths. |
| MOTORHOMES | • motorhomes n. Plural of motorhome. • motor-homes n. Plural of motor-home. • motor␣homes n. Plural of motor home. |
| NOTOCHORDS | • notochords n. Plural of notochord. • NOTOCHORD n. a backbone-like series of cells in the lowest vertebrates. |
| OCTOTHORPS | • octothorps n. Plural of octothorp. • OCTOTHORP n. the symbol # on a telephone or keyboard (hash mark, pound sign, number sign). |
| OOPHORITIS | • oophoritis n. (Pathology) inflammation of the ovaries. • OOPHORITIS n. inflammation of the ovaries. |
| ORTHODOXES | • Orthodoxes n. Plural of Orthodox. • ORTHODOX n. an orthodox person. |
| ORTHOSCOPE | • orthoscope n. An instrument for examining the interior of an eye. • orthoscope n. An instrument for drawing projections of a skull. • ORTHOSCOPE n. a nineteenth century instrument for viewing the fundus of the eye through a layer of water, which eliminates distortion caused by the cornea. |
| ORTHOTONES | • ORTHOTONE n. an orthotone word. |
| OTORRHOEAS | • otorrhoeas n. Plural of otorrhoea. • OTORRHOEA n. a discharge from the ear. |
| OVERSHOOTS | • overshoots v. Third-person singular simple present indicative form of overshoot. • OVERSHOOT v. to shoot over or beyond one's target. |
| POORMOUTHS | • poormouths v. Third-person singular simple present indicative form of poormouth. • POORMOUTH v. to complain about being poor. |
| SMOOTHBORE | • smoothbore adj. (Firearms) having a bore with a smooth interior, ie. one that has not been rifled. • smoothbore n. (Firearms) a cannon, gun or other firearm that has an unrifled barrel. • SMOOTHBORE adj. having a bore of perfectly smooth surface, not rifled. |
| TOOTHWORTS | • toothworts n. Plural of toothwort. • TOOTHWORT n. a plant whose roots are fancied to resemble teeth, as certain plants of the genus Lathraea, and various species of Dentaria. |
| TORCHWOODS | • torchwoods n. Plural of torchwood. • TORCHWOOD n. the inflammable wood of certain trees; also, the trees themselves. |