marriage offer vs marriage proposal

marriage offer and marriage proposal both are nouns.

Word	Noun	Adjective	Verb	Adverb
marriage offer	Yes	No	No	No
marriage proposal	Yes	No	No	No

As nouns, marriage offer and marriage proposal are synonyms defined as:

Other synonyms of marriage offer include proposal, proposal of marriage.

marriage offer (noun)	marriage proposal (noun)
an offer of marriage	an offer of marriage