promote vs gentle

promote is not an adjective while gentle is an adjective.

Word	Noun	Adjective	Verb	Adverb
promote	No	No	Yes	No
gentle	No	Yes	Yes	No

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

Other hyponyms of promote include tenure, bring up, spot promote, ennoble, entitle, favor, favour, prefer, brevet.

promote (adjective)	gentle (adjective)
	marked by moderate steepness
	having little impact
	soft and mild; not harsh or stern or severe
	belonging to or characteristic of the nobility or aristocracy
	quiet and soothing
	easily handled or managed
	having or showing a kindly or tender nature

promote (verb)	gentle (verb)
make publicity for; try to sell (a product)	stroke soothingly
change a pawn for a better piece by advancing it to the eighth row, or change a checker piece for a more valuable piece by moving it to the row closest to your opponent	cause to be more favorably inclined; gain the good will of
be changed for a superior chess or checker piece	give a title to someone; make someone a member of the nobility
give a promotion to or assign to a higher position
contribute to the progress or growth of