silent+partner
131sidekick — Synonyms and related words: ace, amigo, associate, bedfellow, bedmate, birthmate, bosom buddy, buddy, bunkie, bunkmate, butty, camarade, chamberfellow, chum, classmate, clubmate, colleague, comate, companion, company, compeer, comrade, confrere,… …
132teammate — Synonyms and related words: ace, amigo, associate, bedfellow, bedmate, benchfellow, birthmate, bosom buddy, buddy, bunkie, bunkmate, butty, camarade, chamberfellow, chum, classmate, clubmate, co worker, colleague, comate, companion, company,… …