calm down vs gruntle

calm down and gruntle both are verbs.

Word	Noun	Adjective	Verb	Adverb
calm down	No	No	Yes	No
gruntle	No	No	Yes	No

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

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

calm down (verb)	gruntle (verb)
become quiet or less intensive	cause to be more favorably inclined; gain the good will of
make calm or still
become quiet or calm, especially after a state of agitation