marriage ceremony vs marriage

marriage ceremony and marriage both are nouns.

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

As nouns, marriage ceremony and marriage are synonyms defined as:

marriage ceremony and marriage: the act of marrying; the nuptial ceremony

Other synonyms of marriage ceremony include wedding.

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