fail vs lose track

fail and lose track both are verbs.

Word	Noun	Adjective	Verb	Adverb
fail	No	No	Yes	No
lose track	No	No	Yes	No

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

Other hyponyms of fail include strike out, default, default on, choke, muff, miss.

fail (verb)	lose track (verb)
stop operating or functioning	fail to keep informed or aware
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