spill the beans vs uncover

spill the beans and uncover both are verbs.

Word	Noun	Adjective	Verb	Adverb
spill the beans	No	No	Yes	No
uncover	No	No	Yes	No

As verbs, uncover is a hypernym of spill the beans; that is, uncover is a word with a broader meaning than spill the beans:

spill the beans: divulge confidential information or secrets
uncover: make known to the public information that was previously known only to a few people or that was meant to be kept a secret

Other hypernyms of spill the beans include break, bring out, disclose, discover, divulge, expose, give away, let on, let out, reveal, unwrap.

spill the beans (verb)	uncover (verb)
divulge confidential information or secrets	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
	remove all or part of one's clothes to show one's body
	reveal to view as by removing a cover