crumb vs morsel

crumb and morsel both are nouns.

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

As nouns, morsel is a hypernym of crumb; that is, morsel is a word with a broader meaning than crumb:

Other hypernyms of crumb include bit, bite.

crumb (noun)	morsel (noun)
small piece of e.g. bread or cake	a small amount of solid food; a mouthful
a person who is deemed to be despicable or contemptible	a small quantity of anything
a very small quantity of something