lull vs gruntle

lull is a noun but gruntle is not a noun.

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

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

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

lull (noun)	gruntle (noun)
a period of calm weather
a pause during which things are calm or activities are diminished

lull (verb)	gruntle (verb)
become quiet or less intensive	cause to be more favorably inclined; gain the good will of
make calm or still
calm by deception