| Word | Definitions | Synonyms |
|---|---|---|
| topmast | (noun) the mast next above a lower mast and topmost in a fore-and-aft rig | - |
| topminnow | (noun) small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control | Synonyms: live-bearer, poeciliid, poeciliid fish |
| (noun) freshwater fish of Central America having a long swordlike tail; popular aquarium fish | Synonyms: helleri, swordtail, Xyphophorus helleri | |
| topmost | (adjective) at or nearest to the top | Synonyms: upmost, uppermost |