Table of Contents POS
HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun sidekick has 1 sense

• sidekick(n = noun.person) brother, buddy, chum, crony, pal - a close friend who accompanies his buddies in their activities; Array
has particulars: cobber
is a kind of friend

OXFORD DICTIONARY

THESAURUS

sidekick

ace, amigo, associate, bedfellow, bedmate, birthmate, bosom buddy, buddy, bunkie, bunkmate, butty, camarade, chamberfellow, chum, classmate, clubmate, colleague, comate, companion, company, compeer, comrade, confrere, consociate, consort, copartner, copemate, copesmate, couchmate, cradlemate, crony, cupmate, fellow, fellow student, general partner, girl friend, gossip, jailmate, mate, messmate, old crony, pal, pard, pardner, partner, pewmate, playfellow, playmate, roommate, schoolfellow, schoolmate, secret partner, shelfmate, shipmate, shopmate, side partner, sidekicker, silent partner, sleeping partner, special partner, tablemate, teammate, tentmate, watchmate, waymate, workfellow, yokefellow, yokemate

For further exploring for "sidekick" in Webster Dictionary Online