whispering vs rustle

whispering and rustle both are nouns.

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

As nouns, whispering and rustle are synonyms defined as:

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

Other synonyms of whispering include rustling, whisper.

whispering (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

whispering (adjective)	rustle (adjective)
making a low continuous indistinct sound