crouton vs staff of life

crouton and staff of life both are nouns.

Word	Noun	Adjective	Verb	Adverb
crouton	Yes	No	No	No
staff of life	Yes	No	No	No

As nouns, staff of life is a hypernym of crouton; that is, staff of life is a word with a broader meaning than crouton:

crouton: a small piece of toasted or fried bread; served in soup or salads
staff of life: food made from dough of flour or meal and usually raised with yeast or baking powder and then baked

Other hypernyms of crouton include bread, breadstuff.

crouton (noun)	staff of life (noun)
a small piece of toasted or fried bread; served in soup or salads	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked