Synonyms of conversation in English:

discussion, talk, chat, gossip, tête-à-tête, heart-to-heart, head-to-head, exchange, dialogue, parley, consultation, conference

Indian adda

NZ korero

informal confab, jaw, powwow, chit-chat, rap, gas

British informal chinwag, natter, rabbit

Northern English Scottish informal crack

North American informal bull session, skull session, gabfest, schmooze

Australian informal convo

NZ Australian informal yarn

formal confabulation

rare palaver, colloquy, converse