pact vs written agreement

pact and written agreement both are nouns.

Word	Noun	Adjective	Verb	Adverb
pact	Yes	No	No	No
written agreement	Yes	No	No	No

As nouns, written agreement is a hypernym of pact; that is, written agreement is a word with a broader meaning than pact:

pact: a written agreement between two states or sovereigns
written agreement: a legal document summarizing the agreement between parties

pact (noun)	written agreement (noun)
a written agreement between two states or sovereigns	a legal document summarizing the agreement between parties