troops vs hostile

troops and hostile both are nouns.

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

As nouns, hostile is a hyponym of troops; that is, hostile is a word with a more specific, narrower meaning than troops:

Other hyponyms of troops include friendly, cavalry, horse, horse cavalry, garrison.

troops (noun)	hostile (noun)
soldiers collectively	troops belonging to the enemy's military forces

troops (adjective)	hostile (adjective)
	characterized by enmity or ill will
	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