wedding cake vs bridecake

wedding cake and bridecake both are nouns.

Word	Noun	Adjective	Verb	Adverb
wedding cake	Yes	No	No	No
bridecake	Yes	No	No	No

As nouns, wedding cake and bridecake are synonyms defined as:

wedding cake and bridecake: a rich cake with two or more tiers and covered with frosting and decorations; served at a wedding reception

wedding cake (noun)	bridecake (noun)
a rich cake with two or more tiers and covered with frosting and decorations; served at a wedding reception	a rich cake with two or more tiers and covered with frosting and decorations; served at a wedding reception