confidant
confidante
[noun]
Synonyms: close friend, alter ego, bosom friend, crony, familiar, intimate

[TahlilGaran] English Synonym Dictionary ▲

con‧fi‧dant /ˈkɒnfədænt, ˈkɒnfɪdænt, ˌkɒnfəˈdænt, -ˈdɑːnt $ ˈkɑːnfədænt/ noun [countable]
[Word Family: noun: confidence, confidant, confidentiality; adverb: confidently, confidentially; adjective: confident, confidential; verb: confide]
[Date: 1600-1700; Origin: confident]
someone you tell your secrets to or who you talk to about personal things

[TahlilGaran] Dictionary of Contemporary English ▲