| ARBORVITAES | • arborvitaes n. Plural of arborvitae. • ARBORVITAE n. any of a number of North American or Far Eastern evergreen conifers, belonging chiefly to the genus Thuja. |
| ARBOVIRUSES | • arboviruses n. Plural of arbovirus. • ARBOVIRUS n. any of a group of viruses spread by mosquitoes. |
| HERBIVORIES | • HERBIVORY n. the eating of grass. |
| HERBIVOROUS | • herbivorous adj. Feeding chiefly on plants. • HERBIVOROUS adj. eating plants. |
| HOVERBOARDS | • hoverboards n. Plural of hoverboard. • HOVERBOARD n. a narrow horizontal board with wheels at each end, on which a person may stand upright and move by leaning forwards. |
| OBSERVATORS | • observators n. Plural of observator. • OBSERVATOR n. one who observes or takes notice. |
| OBSERVATORY | • observatory n. A place where stars, planets and other celestial bodies are observed, usually through a telescope; also… • observatory n. A lookout (vantage point with a view of the surrounding area). • OBSERVATORY n. a building or place given over to or equipped for observation of natural phenomena (as in astronomy). |
| OVERBIDDERS | • overbidders n. Plural of overbidder. • OVERBIDDER n. one who makes unduly high bids. |
| OVERBORROWS | • overborrows v. Third-person singular simple present indicative form of overborrow. • OVERBORROW v. to borrow to excess. |
| OVERBRIDGES | • overbridges n. Plural of overbridge. • overbridges v. Third-person singular simple present indicative form of overbridge. • over␣bridges n. Plural of over bridge. |
| OVERBROWSED | • overbrowsed v. Simple past tense and past participle of overbrowse. • OVERBROWSE v. to browse to excess. |
| OVERBROWSES | • overbrowses v. Third-person singular simple present indicative form of overbrowse. • OVERBROWSE v. to browse to excess. |
| OVERBURDENS | • overburdens n. Plural of overburden. • overburdens v. Third-person singular simple present indicative form of overburden. • OVERBURDEN v. to overload, also OVERBURTHEN. |
| OVERLABOURS | • overlabours v. Third-person singular simple present indicative form of overlabour. • OVERLABOUR v. (archaic) to labour excessively, also OVERLABOR. |
| REOBSERVING | • reobserving v. Present participle of reobserve. • REOBSERVE v. to observe again. |
| RHABDOVIRUS | • rhabdovirus n. Any of the rod-shaped viruses belonging to the family Rhabdoviridae. • RHABDOVIRUS n. a class of virus that includes rabies. |
| SCRIVEBOARD | • SCRIVEBOARD n. a shipbuilder's drawing board, also SCRIEVEBOARD. |
| VERGEBOARDS | • vergeboards n. Plural of vergeboard. • VERGEBOARD n. a board projecting from a roof gable, aka bargeboard. |
| VIBROGRAPHS | • vibrographs n. Plural of vibrograph. • VIBROGRAPH n. an instrument for recording vibrations. |
| VIBROMETERS | • vibrometers n. Plural of vibrometer. • VIBROMETER n. an instrument for measuring vibrations. |