nuptials vs wedding ceremony

nuptials and wedding ceremony both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuptials	Yes	No	No	No
wedding ceremony	Yes	No	No	No

As nouns, nuptials and wedding ceremony are synonyms defined as:

nuptials and wedding ceremony: the social event at which the ceremony of marriage is performed

Other synonyms of nuptials include hymeneals, wedding.

nuptials (noun)	wedding ceremony (noun)
the social event at which the ceremony of marriage is performed	the social event at which the ceremony of marriage is performed