defeat vs beat out

defeat is a noun but beat out is not a noun.

Word	Noun	Adjective	Verb	Adverb
defeat	Yes	No	Yes	No
beat out	No	No	Yes	No

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

defeat (noun)	beat out (noun)
an unsuccessful ending to a struggle or contest
the feeling that accompanies an experience of being thwarted in attaining your goals

defeat (verb)	beat out (verb)
win a victory over	come out better in a competition, race, or conflict
thwart the passage of	beat out a rhythm