| Word | Definitions | Synonyms |
|---|---|---|
| umbellifer | (noun) any of numerous aromatic herbs of the family Umbelliferae | Synonyms: umbelliferous plant |
| unbelief | (noun) a rejection of belief | Synonyms: disbelief |
| underbelly | (noun) the quality of being weak or unprotected | - |
| (noun) the soft belly or underside of an animal's body | Synonyms: underbody | |
| (noun) lower side | - |