foe vs competition

foe and competition both are nouns.

Word	Noun	Adjective	Verb	Adverb
foe	Yes	No	No	No
competition	Yes	No	No	No

As nouns, competition is a hypernym of foe; that is, competition is a word with a broader meaning than foe:

Other hypernyms of foe include challenger, competitor, contender, rival.

foe (noun)	competition (noun)
a personal enemy	the act of competing as for profit or a prize
an armed adversary (especially a member of an opposing military force)	an occasion on which a winner is selected from among two or more contestants
	the contestant you hope to defeat
	a business relation in which two parties compete to gain customers