bend over backwards vs behave

bend over backwards and behave both are verbs.

Word	Noun	Adjective	Verb	Adverb
bend over backwards	No	No	Yes	No
behave	No	No	Yes	No

As verbs, behave is a hypernym of bend over backwards; that is, behave is a word with a broader meaning than bend over backwards:

bend over backwards: try very hard to please someone
behave: behave in a certain manner; show a certain behavior; conduct or comport oneself

Other hypernyms of bend over backwards include acquit, act, bear, carry, comport, conduct, deport, do.

bend over backwards (verb)	behave (verb)
try very hard to please someone	behave in a certain manner; show a certain behavior; conduct or comport oneself
	behave well or properly