ritual vs wedding

ritual and wedding both are nouns.

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

As nouns, wedding is a hyponym of ritual; that is, wedding is a word with a more specific, narrower meaning than ritual:

Other hyponyms of ritual include betrothal, espousal, marriage, marriage ceremony, rite of passage.

ritual (noun)	wedding (noun)
any customary observance or practice	the act of marrying; the nuptial ceremony
the prescribed procedure for conducting religious ceremonies	the social event at which the ceremony of marriage is performed
stereotyped behavior	a party of people at a wedding

ritual (adjective)	wedding (adjective)
of or relating to or employed in social rites or rituals
of or relating to or characteristic of religious rituals