betray vs uncover

betray and uncover both are verbs.

Word	Noun	Adjective	Verb	Adverb
betray	No	No	Yes	No
uncover	No	No	Yes	No

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

betray: reveal unintentionally
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 betray include break, bring out, disclose, discover, divulge, expose, give away, let on, let out, reveal, unwrap.

betray (verb)	uncover (verb)
give away information about somebody	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
reveal unintentionally	remove all or part of one's clothes to show one's body
cause someone to believe an untruth	reveal to view as by removing a cover
disappoint, prove undependable to; abandon, forsake
deliver to an enemy by treachery
be sexually unfaithful to one's partner in marriage