grumble vs scold

grumble and scold both are nouns.

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

As verbs, grumble and scold are synonyms defined as:

Other synonyms of grumble include grouch.

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

grumble (verb)	scold (verb)
make complaining remarks or noises under one's breath	censure severely or angrily
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