bridecake vs wedding cake

bridecake and wedding cake both are nouns.

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

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

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

bridecake (noun)	wedding cake (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