| Word | Definitions | Synonyms |
|---|---|---|
| derris | (noun) any of various usually woody vines of the genus Derris of tropical Asia whose roots yield the insecticide rotenone; several are sources of native fish and arrow poisons | - |
| orris | (noun) German iris having large white flowers with lavender-tinged falls and a fragrant rhizome | Synonyms: Florentine iris, Iris florentina, Iris germanica florentina |
| (noun) fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines | Synonyms: orrisroot |