be-all and end-all vs component

be-all and end-all and component both are nouns.

Word	Noun	Adjective	Verb	Adverb
be-all and end-all	Yes	No	No	No
component	Yes	No	No	No

As nouns, component is a hypernym of be-all and end-all; that is, component is a word with a broader meaning than be-all and end-all:

be-all and end-all: the essential factor; the all-important element; the supreme aim
component: an abstract part of something

Other hypernyms of be-all and end-all include constituent, element, factor, ingredient.

be-all and end-all (noun)	component (noun)
the essential factor; the all-important element; the supreme aim	an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
	an abstract part of something
	something determined in relation to something that includes it