bedfellow

someone associated with another to give assistance or moral support a child-welfare cause that has made bedfellows of activists who are normally on opposite ends of the political spectrum Synonyms abettor (also abetter), backer, ally, confederate, fellow traveler, supporter, sympathizerRelated Words empathizer, well-wisher; accessory (also accessary), accomplice, coalitionist, collaborationist, collaborator; adjunct, assistant, coadjutor, helper; associate, cohort, colleague, fellow, partner; buddy, chum, companion, comrade, confidant, crony, familiar, friend, intimate, mate, palNear Antonyms belittler, detractor; adversary, enemy, foe, opponent