warlord vs military leader

warlord and military leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
warlord	Yes	No	No	No
military leader	Yes	No	No	No

As nouns, military leader is a hypernym of warlord; that is, military leader is a word with a broader meaning than warlord:

warlord: supreme military leader exercising civil power in a region especially one accountable to nobody when the central government is weak
military leader: a leader of military forces

warlord (noun)	military leader (noun)
supreme military leader exercising civil power in a region especially one accountable to nobody when the central government is weak	a leader of military forces