Synonyms of word of mouth

Noun

1. grapevine, pipeline, word of mouth, gossip, comment, scuttlebutt

usage: gossip spread by spoken communication; "the news of their affair was spread by word of mouth"

Adjective

1. viva-voce, word-of-mouth, spoken (vs. written)

usage: expressed orally; "a viva-voce report"; "the film had good word-of-mouth publicity"