gentle vs kick upstairs

gentle is an adjective but kick upstairs is not an adjective.

Word	Noun	Adjective	Verb	Adverb
gentle	No	Yes	Yes	No
kick upstairs	No	No	Yes	No

As verbs, kick upstairs is a hypernym of gentle; that is, kick upstairs is a word with a broader meaning than gentle:

Other hypernyms of gentle include advance, elevate, promote, raise, upgrade.

gentle (adjective)	kick upstairs (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

gentle (verb)	kick upstairs (verb)
stroke soothingly	give a promotion to or assign to a higher position
cause to be more favorably inclined; gain the good will of
give a title to someone; make someone a member of the nobility