| Word | Definitions | Synonyms |
|---|---|---|
| featherbrained | (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, giddy, light-headed, lightheaded, silly |
| herbaceous | (adjective) characteristic of a nonwoody herb or plant part | - |
| herbal | (adjective) of or relating to herbs | - |
| herbivorous | (adjective) feeding only on plants | - |