scold vs grumble

scold and grumble both are nouns.

Word	Noun	Adjective	Verb	Adverb
scold	Yes	No	Yes	No
grumble	Yes	No	Yes	No

As verbs, scold and grumble are synonyms defined as:

Other synonyms of scold include grouch.

scold (noun)	grumble (noun)
someone (especially a woman) who annoys people by constantly finding fault	a complaint uttered in a low and indistinct tone
	a loud low dull continuous noise

scold (verb)	grumble (verb)
censure severely or angrily	make complaining remarks or noises under one's breath
show one's unhappiness or critical attitude	show one's unhappiness or critical attitude
	to utter or emit low dull rumbling sounds
	make a low noise