fall in vs crumple

fall in and crumple both are verbs.

Word	Noun	Adjective	Verb	Adverb
fall in	No	No	Yes	No
crumple	No	No	Yes	No

As verbs, crumple is a hyponym of fall in; that is, crumple is a word with a more specific, narrower meaning than fall in:

Other hyponyms of fall in include go off, implode, buckle, flop, break, sink, slide down, slump.

fall in (verb)	crumple (verb)
break down, literally or metaphorically	become wrinkled or crumpled or creased
become part of; become a member of a group or organization	to gather something into small wrinkles or folds
to take one's place in a military formation or line	fold or collapse
	fall apart