whispering
[noun]
Synonyms: report, buzz, cry, gossip, grapevine, hearsay, rumble, rumor, scuttlebutt, talk

[TahlilGaran] English Synonym Dictionary ▲

whispering noun. ['wɪsp(ǝ)rɪŋ] OE.
[from WHISPER verb + -ING¹.]
The action of WHISPER verb; an instance of this.

Comb.:
whispering campaign a systematic circulation of a rumour, esp. in order to denigrate a person or thing; whispering-gallery a usu. circular or elliptical gallery situated under a dome, whose acoustic properties are such that a whisper may be heard round its entire circumference.

[TahlilGaran] English Dictionary ▲