hostile vs opponent

hostile and opponent both are nouns.

Word	Noun	Adjective	Verb	Adverb
hostile	Yes	Yes	No	No
opponent	Yes	Yes	No	No

hostile (noun)	opponent (noun)
troops belonging to the enemy's military forces	someone who offers opposition
	a contestant that you are matched against

hostile (adjective)	opponent (adjective)
characterized by enmity or ill will	characterized by active hostility
not belonging to your own country's forces or those of an ally
unsolicited and resisted by the management of the target company (used of attempts to buy or take control of a business)
very unfavorable to life or growth
impossible to bring into friendly accord