fail vs burn out

fail and burn out both are verbs.

Word	Noun	Adjective	Verb	Adverb
fail	No	No	Yes	No
burn out	No	No	Yes	No

As verbs, burn out is a hyponym of fail; that is, burn out is a word with a more specific, narrower meaning than fail:

Other hyponyms of fail include crash, go down, blow, blow out, misfire, malfunction, misfunction.

fail (verb)	burn out (verb)
stop operating or functioning	melt, break, or become otherwise unusable
deteriorate
prove insufficient
disappoint, prove undependable to; abandon, forsake
become bankrupt or insolvent; fail financially and close
be unsuccessful
fail to get a passing grade
fail to do something; leave something undone
judge unacceptable
be unable
fall short in what is expected