noun
1.
knowledge of something based on personal exposure
had a considerable acquaintance with modern poetry
Synonyms: experience, familiarity, intimacy, inwardness
Related Word: apprehension, grasp, ken; appreciation, awareness, consciousness
Contrasted words: inexperience, unfamiliarity; greenness, verdancy
2.
Synonyms: friend , amigo, cater-cousin, confidant, familiar, intimate, mate
Related Word: associate, companion, comrade, crony
Contrasted words: outsider, stranger