| ARTHROSPORES | • arthrospores n. Plural of arthrospore. • ARTHROSPORE n. another name for an oidium. |
| CHLOROFORMER | • chloroformer n. One who uses chloroform. • CHLOROFORMER n. one who administers chloroform. |
| CHOROGRAPHER | • chorographer n. Someone who describes a particular region or country. • CHOROGRAPHER n. one who maps or describes a region. |
| FERROCHROMES | • ferrochromes n. Plural of ferrochrome. • FERROCHROME n. an alloy of iron with chromium, also FERROCHROMIUM. |
| HOROGRAPHERS | • horographers n. Plural of horographer. • HOROGRAPHER n. one who constructs timepieces. |
| ORCHESTRATOR | • orchestrator n. One who orchestrates. • ORCHESTRATOR n. one who orchestrates, also ORCHESTRATER. |
| ORTHOGRAPHER | • orthographer n. Someone who devises an orthography. • orthographer n. (Informal) Someone who is knowledgeable in spelling rules; someone who spells words correctly. • ORTHOGRAPHER n. a correct speller. |
| OVERTHROWERS | • overthrowers n. Plural of overthrower. • OVERTHROWER n. one who overthrows. |
| PORNOGRAPHER | • pornographer n. One who is involved in the creation or dissemination of pornography. • PORNOGRAPHER n. one who produces pornography. |
| RHEORECEPTOR | • RHEORECEPTOR n. a receptor in fish and some amphibians that responds to water currents. |
| RHINORRHOEAL | • rhinorrhoeal adj. Alternative form of rhinorrheal. • rhinorrhœal adj. Rare form of rhinorrheal. • RHINORRHOEAL adj. relating to rhinorrhoea, continuous nasal catarrh. |
| RHINORRHOEAS | • rhinorrhoeas n. Plural of rhinorrhoea. • RHINORRHOEA n. continuous nasal catarrh. |
| ROADWORTHIER | • ROADWORTHY adj. able to be used on a road. |