The Oxford Thesaurus An A-Z Dictionary of Synonyms - bosom n.

1) breast, chest, bust; Slang boobs, knockers, tits, titties, pair, jugs, Brit Bristols: The sex goddess's lack of talent was more than compensated for by her ample bosom. 2) midst, interior, heart, core, centre: She was welcomed into the bosom of the family as if she had been their own child. 3) soul, heart, heart of hearts, bowels, blood, Colloq gut: I know he loves me, I can feel it in my bosom. --adj. 4) close, intimate, dear, beloved, cherished, boon, special, confidential: We were once bosom companions.