whisper vs rustle

whisper and rustle both are nouns.

Word	Noun	Adjective	Verb	Adverb
whisper	Yes	No	Yes	No
rustle	Yes	No	Yes	No

As nouns, whisper and rustle are synonyms defined as:

whisper and rustle: a light noise, like the noise of silk clothing or leaves blowing in the wind

Other synonyms of whisper include rustling, whispering.

whisper (noun)	rustle (noun)
speaking softly without vibration of the vocal cords	a light noise, like the noise of silk clothing or leaves blowing in the wind
a light noise, like the noise of silk clothing or leaves blowing in the wind