Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

friend, bosom friend, soulmate, fast friend; amicus [Lat.]; usque ad aras [Lat.]; fidus Achates [Lat.]; persona grata. acquaintance, neighbor, next-door neighbor, casual acquaintance, nodding acquaintance; wellwisher. favorer, fautor†, patron, Mecaenas; tutelary saint, good genius, advocate, partisan, sympathizer; ally; friend in need &c (auxiliary) 711. comrade, mate, companion, familiar, confrere, comrade, camarade†, confidante, intimate; old crony, crony; chum; pal; buddy, bosom buddy; playfellow, playmate, childhood friend; bedfellow, bedmate; chamber fellow. associate, colleague, compeer. schoolmate, schoolfellow†; classfellow†, classman†, classmate; roommate; fellow-man, stable companion. best man, maid of honor, matron of honor. compatriot; fellow countryman, countryman. shopmate, fellow-worker, shipmate, messmate†; fellow companion, boon companion, pot companion; copartner, partner, senior partner, junior partner. Arcades ambo Pylades and Orestes Castor and Pollux†, Nisus and Euryalus [Lat.], Damon and Pythias, par nobile fratrum [Lat.]. host, Amphitryon†, Boniface; guest, visitor, protégé. Phr. amici probantur rebus adversis [Lat.]; ohne bruder kann man leben nicht ohne Freund [G.]; best friend, my well-spring in the wilderness [G. Eliot]; conocidos muchos amigos pocos [Sp.]; friend more divine than all divinities [G. Eliot]; vida sin amigo muerte sin testigo [Sp.].