| AEROMOTORS | • aeromotors n. Plural of aeromotor. • AEROMOTOR n. an engine for aircraft. |
| ARROWROOTS | • arrowroots n. Plural of arrowroot. • arrow-roots n. Plural of arrow-root (alternative form of arrowroots). • ARROWROOT n. a West Indian plant with fleshy tuberous rhizomes; a pure edible starch made from this. |
| CORALROOTS | • coralroots n. Plural of coralroot. • CORALROOT n. a kind of orchid. |
| COURTROOMS | • courtrooms n. Plural of courtroom. • court␣rooms n. Plural of court room. • COURTROOM n. a room in a courthouse in which lawsuits and criminal cases are heard. |
| MOTORSPORT | • motorsport n. Auto racing. • motorsport n. Any sport involving automobiles (motor cars) other than racing; e.g. time trials. |
| ORRISROOTS | • orrisroots n. Plural of orrisroot. • ORRISROOT n. the root of orris, used in perfumery. |
| OTORRHOEAS | • otorrhoeas n. Plural of otorrhoea. • OTORRHOEA n. a discharge from the ear. |
| OUTROOPERS | • OUTROOPER n. (obsolete) an auctioneer; the Common Crier of the City, also OUTROPER. |
| ROTOVATORS | • rotovators n. Plural of rotovator. • ROTOVATOR n. (tradename) a tool for breaking up the soil, also ROTAVATOR. |
| SERVOMOTOR | • servomotor n. An electric motor in a servomechanism, especially one which incorporates feedback so it accurately positions… • SERVOMOTOR n. a motor using a servomechanism. |
| STOREROOMS | • storerooms n. Plural of storeroom. • STOREROOM n. a room in which things are stored. |
| STORMPROOF | • stormproof adj. Capable of resisting a storm. • storm-proof adj. Alternative form of stormproof. • STORMPROOF adj. proof against bad weather. |
| STROBOTRON | • strobotron n. A cold-cathode tube designed for high-current narrow pulses, used in high-speed photography. • STROBOTRON n. a gas-filled electron tube used esp. as a source of bright flashes of light for a stroboscope. |
| STRONGROOM | • strongroom n. A strongly built room or vault where valuables may be safely stored. • strong␣room n. Alternative spelling of strongroom. • STRONGROOM n. a room for the keeping of valuables etc. |
| WOOLSORTER | • woolsorter n. A farmworker responsible for sorting wool into coarser and finer grades. • wool␣sorter n. Alternative form of woolsorter. • WOOLSORTER n. a person who sorts wool according to quality. |