wedding vs ceremony

wedding and ceremony both are nouns.

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

As nouns, ceremony is a hypernym of wedding; that is, ceremony is a word with a broader meaning than wedding:

Other hypernyms of wedding include ceremonial, ceremonial occasion, observance.

wedding (noun)	ceremony (noun)
the act of marrying; the nuptial ceremony	the proper or conventional behavior on some solemn occasion
the social event at which the ceremony of marriage is performed	any activity that is performed in an especially solemn elaborate or formal way
a party of people at a wedding	a formal event performed on a special occasion