BUDDY
buddy, brother, chum, crony, pal, sidekick
(noun) a close friend who accompanies his buddies in their activities
Source: WordNet® 3.1
Etymology 1
Noun
buddy (plural buddies)
A friend or casual acquaintance.
Synonyms: bud, mate, Thesaurus:friend
A partner for a particular activity.
Synonyms: companion, partner
An informal and friendly address to a stranger; a friendly (or occasionally antagonistic) placeholder name for a person one does not know.
Synonyms: mate, fellow
Verb
buddy (third-person singular simple present buddies, present participle buddying, simple past and past participle buddied)
(transitive) To assign a buddy, or partner, to.
Etymology 2
Adjective
buddy (comparative more buddy, superlative most buddy)
Resembling a bud.
Etymology
Proper noun
Buddy
A male nickname.
(rare, chiefly, US) A male given name from English.
A given name for a dog.
Source: Wiktionary