marriage vs wedding

marriage and wedding both are nouns.

Word	Noun	Adjective	Verb	Adverb
marriage	Yes	No	No	No
wedding	Yes	No	No	No

As nouns, marriage and wedding are synonyms defined as:

Other synonyms of marriage include marriage ceremony.

marriage (noun)	wedding (noun)
the act of marrying; the nuptial ceremony	the act of marrying; the nuptial ceremony
two people who are married to each other	the social event at which the ceremony of marriage is performed
the state of being a married couple voluntarily joined for life (or until divorce)	a party of people at a wedding
a close and intimate union