| OBSERVATORS | • observators n. Plural of observator. • OBSERVATOR n. one who observes or takes notice. |
| OVERASSERTS | • overasserts v. Third-person singular simple present indicative form of overassert. • OVERASSERT v. to assert to excess. |
| OVERMASTERS | • overmasters v. Third-person singular simple present indicative form of overmaster. • OVERMASTER v. to overpower. |
| OVERSTAYERS | • overstayers n. Plural of overstayer. • OVERSTAYER n. an immigrant worker who stays over the time allowed by his or her work permit. |
| OVERSTOREYS | • overstoreys n. Plural of overstorey. • OVERSTOREY n. the highest level of trees in a rainforest, also OVERSTORY. |
| OVERSTORIES | • overstories n. Plural of overstory. • OVERSTORY n. the highest level of trees in a rainforest, also OVERSTOREY. |
| OVERSTRAINS | • overstrains v. Third-person singular simple present indicative form of overstrain. • OVERSTRAIN v. to strain to excess. |
| OVERSTRIDES | • overstrides v. Third-person singular simple present indicative form of overstride. • overstrides n. Plural of overstride. • OVERSTRIDE v. to stride over, across, or beyond. |
| OVERSTRIKES | • overstrikes n. Plural of overstrike. • OVERSTRIKE v. to strike beyond. |
| OVERTHRUSTS | • overthrusts n. Plural of overthrust. • overthrusts v. Third-person singular simple present indicative form of overthrust. • OVERTHRUST n. a fault at a low angle from the horizontal in which the rocks on the upper side of the fault plane have moved upwards in relation to the rocks on the lower side of the fault plane. |
| PROVOSTRIES | • provostries n. Plural of provostry. • PROVOSTRY n. the office of provost, the head of certain universities and colleges. |
| ROOTSERVERS | • ROOTSERVER n. a computer that acts as the main server for a whole service. |
| ROTAVIRUSES | • rotaviruses n. Plural of rotavirus. • ROTAVIRUS n. a wheel-shaped virus causing gastroenteritis. |
| SERVOMOTORS | • servomotors n. Plural of servomotor. • SERVOMOTOR n. a motor using a servomechanism. |
| STRIKEOVERS | • strikeovers n. Plural of strikeover. • STRIKEOVER n. an act or instance of striking a typewritten character on a spot occupied by another character. |