treaty vs peace treaty

treaty and peace treaty both are nouns.

Word	Noun	Adjective	Verb	Adverb
treaty	Yes	No	No	No
peace treaty	Yes	No	No	No

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

Other hyponyms of treaty include alliance, commercial treaty, pacification, peace, convention.

treaty (noun)	peace treaty (noun)
a written agreement between two states or sovereigns	a treaty to cease hostilities