The Oxford Thesaurus An A-Z Dictionary of Synonyms - whisper v.

1) breathe, murmur, mutter, mumble, hiss, speak or say softly or under (one's) breath, sigh, susurrate: He whispered sweet nothings in her ear. 2) gossip, bruit about, noise abroad, murmur, insinuate, hint, rumour, disclose, divulge, reveal, breathe a word: We have all heard Corin whispering of your wife's infidelities. --n. 3) murmur, undertone, hushed tone(s) : Why do you always speak in whispers when talking about Nesta? 4 hint, suggestion, soup‡on, suspicion: There was never the slightest whisper of gossip about Eleanor.