militarism vs hawkishness

militarism and hawkishness both are nouns.

Word	Noun	Adjective	Verb	Adverb
militarism	Yes	No	No	No
hawkishness	Yes	No	No	No

As nouns, hawkishness is a hypernym of militarism; that is, hawkishness is a word with a broader meaning than militarism:

militarism: a political orientation of a people or a government to maintain a strong military force and to be prepared to use it aggressively to defend or promote national interests
hawkishness: any political orientation favoring aggressive policies

militarism (noun)	hawkishness (noun)
a political orientation of a people or a government to maintain a strong military force and to be prepared to use it aggressively to defend or promote national interests	any political orientation favoring aggressive policies