Friend, acquaintance, intimate, confidant are comparable when they designate a person, especially not related by blood, with whom one is on good and, usually, familiar terms.
Freedom vs Liberty vs License
Freedom, liberty, license are comparable when meaning the state or condition of one who can think, believe, or act as he wishes.
Free vs Release vs Liberate vs Emancipate vs Manumit vs Deliver vs Discharge vs Enfranchise
Free, release, liberate, emancipate, manumit, deliver, discharge, enfranchise are comparable when meaning to set loose from whatever ties or binds or to make clear of whatever encumbers or holds back.
Free vs Independent vs Sovereign vs Autonomous vs Autarchic vs Autarkic
Free, independent, sovereign, autonomous, autarchic, autarkic are comparable when they mean not subject to the rule or control of another.
Frank vs Candid vs Open vs Plain
Frank, candid, open, plain are comparable when they mean showing in speech, looks, and manners the willingness to tell what one feels or thinks.
Fragrance vs Perfume vs Incense vs Redolence vs Bouquet
Fragrance, perfume, incense, redolence, bouquet are comparable when denoting a sweet or pleasant odor.
Fragile vs Frangible vs Brittle vs Crisp vs Short vs Friable
Fragile, frangible, brittle, crisp, short, friable mean easily broken. They are, however, not often interchangeable.
Found vs Establish vs Institute vs Organize
Found, establish, institute, organize are comparable when meaning to set going or to bring into existence something (as a business, a colony, or an institution).
Fortitude vs Grit vs Backbone vs Pluck vs Guts vs Sand
Fortitude, grit, backbone, pluck, guts, sand denote a quality of character combining courage and staying power.
Forthright vs Downright
Forthright , downright are comparable because they agree in their basic sense of moving or in the habit of moving straight to the mark.
Fort vs Fortress vs Citadel vs Stronghold vs Fastness
Fort, fortress, citadel, stronghold, fastness denote in common a structure or place offering resistance to a hostile force.
Formless vs Unformed vs Shapeless
Formless, unformed, shapeless are comparable when they mean having no definite or recognizable form.