fragment vs crumb

fragment and crumb both are nouns.

Word	Noun	Adjective	Verb	Adverb
fragment	Yes	No	Yes	No
crumb	Yes	No	Yes	No

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

fragment (noun)	crumb (noun)
a broken piece of a brittle artifact	small piece of e.g. bread or cake
an incomplete piece	a person who is deemed to be despicable or contemptible
a piece broken off or cut off of something else	a very small quantity of something

fragment (verb)	crumb (verb)
break or cause to break into pieces	remove crumbs from
	break into crumbs
	coat with bread crumbs