wedding vs marriage

wedding and marriage both are nouns.

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

As nouns, wedding and marriage are synonyms defined as:

Other synonyms of wedding include marriage ceremony.

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