insist vs asseverate

insist and asseverate both are verbs.

Word	Noun	Adjective	Verb	Adverb
insist	No	No	Yes	No
asseverate	No	No	Yes	No

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

Other hyponyms of insist include hold firm, stand fast, stand firm, stand pat, assert, maintain.

insist (verb)	asseverate (verb)
postulate positively and assertively	state categorically
be emphatic or resolute and refuse to budge
beg persistently and urgently