intermarry vs espouse

intermarry and espouse both are verbs.

Word	Noun	Adjective	Verb	Adverb
intermarry	No	No	Yes	No
espouse	No	No	Yes	No

As verbs, espouse is a hypernym of intermarry; that is, espouse is a word with a broader meaning than intermarry:

Other hypernyms of intermarry include conjoin, get hitched with, get married, hook up with, marry, wed.

intermarry (verb)	espouse (verb)
marry within the same ethnic, social, or family group	take up the cause, ideology, practice, method, of someone and use it as one's own
	choose and follow; as of theories, ideas, policies, strategies or plans
	take in marriage; married