whispering vs murmuring

whispering and murmuring both are nouns.

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

As adjectives, whispering and murmuring are synonyms defined as:

Other synonyms of whispering include susurrant.

whispering (noun)	murmuring (noun)
speaking softly without vibration of the vocal cords	a complaint uttered in a low and indistinct tone
a light noise, like the noise of silk clothing or leaves blowing in the wind	a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech

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