| Word | Definitions | Synonyms |
|---|---|---|
| fractiously | (adverb) in a fractious manner | - |
| (adverb) in a peevish manner | Synonyms: peevishly, querulously | |
| frankly | (adverb) (used as intensives reflecting the speaker's attitude) it is sincerely the case that | Synonyms: candidly, honestly |
| frantically | (adverb) in an ungovernable manner | Synonyms: madly |
| fraternally | (adverb) in a brotherly manner | - |
| fraudulently | (adverb) in a dishonest and fraudulent manner | - |