buckle under vs defer

buckle under and defer both are verbs.

Word	Noun	Adjective	Verb	Adverb
buckle under	No	No	Yes	No
defer	No	No	Yes	No

As verbs, defer is a hyponym of buckle under; that is, defer is a word with a more specific, narrower meaning than buckle under:

Other hyponyms of buckle under include accede, bow, give in, submit.

buckle under (verb)	defer (verb)
consent reluctantly	yield to another's wish or opinion
	hold back to a later time