rest vs be

rest is a noun but be is not a noun.

Word	Noun	Adjective	Verb	Adverb
rest	Yes	No	Yes	No
be	No	No	Yes	No

As verbs, be is a hypernym of rest; that is, be is a word with a broader meaning than rest:

rest: stay the same; remain in a certain state
be: have the quality of being; (copula, used with an adjective or a predicate noun)

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

rest: stay the same; remain in a certain state
be: to remain unmolested, undisturbed, or uninterrupted -- used only in infinitive form

Other hyponyms of rest include keep out, sit tight, stay together, stick together, stand, keep, stay fresh.

As verbs, be is a hypernym of rest; that is, be is a word with a broader meaning than rest:

rest: not move; be in a resting position
be: have the quality of being; (copula, used with an adjective or a predicate noun)

As verbs, be is a hypernym of rest; that is, be is a word with a broader meaning than rest:

rest (noun)	be (noun)
freedom from activity (work or strain or responsibility)
a support on which things can be put
a musical notation indicating a silence of a specified duration
something left after other parts have been taken away
a state of inaction
euphemisms for death (based on an analogy between lying in a bed and in a tomb)
a pause for relaxation

rest (verb)	be (verb)
be at rest	spend or use time
stay the same; remain in a certain state	work in a specific place, with a specific subject, or in a specific function
take a short break from one's activities in order to relax	have an existence, be extant
give a rest to	have life, be alive
not move; be in a resting position	form or compose
sit, as on a branch	have the quality of being; (copula, used with an adjective or a predicate noun)
rest on or as if on a pillow	occupy a certain position or area; be somewhere
put something in a resting position, as for support or steadying	be identical to; be someone or something
be inactive, refrain from acting	be identical or equivalent to
have a place in relation to something else	represent, as of a character on stage
be inherent or innate in	be priced at
	to remain unmolested, undisturbed, or uninterrupted -- used only in infinitive form