Words

Forestall

prevent or restrict

Synonyms:avert

Forlorn

alone and uphappy; left alone and not cared

"She looked a forlorn figure standing at the bus stop"

Forswear

to strongly reject or give up something, especially a belief or habit

"He forswear junk food to stay healthy"

Synonyms:abandon, renounce, forgo, abjure, reject, relinquish

Forthright

Synonyms:frank, straightforward, candid, over spoken

Antonyms:dishonest, devious

Fortuitous

happening by chance rather than intention

Synonyms:accidental

Fossilize

Synonyms:amalgamate, combine

Foster

encourage the development of something

"The teacher's task is to foster learning"

Synonyms:encourage

Founder

(of a ship) fill with water and sink

"The ship foundered off the coast"

Synonyms:sink, submerge

Fraught

Synonyms:anxious, worried, upset, distraught

Fray

a situation of intense activity or competition

Synonyms:battle, conflict, dispute

Freezing

Antonyms:tropical

Frenetic

fast and energetic in a rather wild and uncontrolled way

Synonyms:frantic, wild, frenzied, hectic

Fret

nervous or worried

"Don't fret - I'm sure he's OK"

Friar

Synonyms:monk

Fright

a sudden intense feeling of fear

Frisk

to move around in a happy, energetic way

Synonyms:frolic, gambol, cavort

Fritter

divide (something) into small pieces

Antonyms:hoard, amass

Frivolous

not having any serious purpose or value

"They waste their time and money on frivolous things"

Synonyms:flippant, insignificant

Antonyms:important, significant

Fugitive

a person who has escaped from captivity or is in hiding

Synonyms:escapee, runaway

Fulminate

express vehement protest

Synonyms:protest, rage, inveigh