be vs attend

be and attend both are verbs.

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

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

be (verb)	attend (verb)
spend or use time	give heed (to)
work in a specific place, with a specific subject, or in a specific function	work for, or be a servant to
have an existence, be extant	take charge of or deal with
have life, be alive	be present at (meetings, church services, university), etc.
form or compose	to accompany as a circumstance or follow as a result
have the quality of being; (copula, used with an adjective or a predicate noun)
occupy a certain position or area; be somewhere
be identical to; be someone or something
be identical or equivalent to
represent, as of a character on stage
be priced at
to remain unmolested, undisturbed, or uninterrupted -- used only in infinitive form