quieten vs gruntle

quieten and gruntle both are verbs.

Word	Noun	Adjective	Verb	Adverb
quieten	No	No	Yes	No
gruntle	No	No	Yes	No

As verbs, gruntle is a hyponym of quieten; that is, gruntle is a word with a more specific, narrower meaning than quieten:

Other hyponyms of quieten include lull, compose, appease, assuage, conciliate, gentle, lenify, mollify, pacify, placate.

quieten (verb)	gruntle (verb)
cause to be quiet or not talk	cause to be more favorably inclined; gain the good will of
make calm or still
become quiet or quieter