upside-down cake vs skillet cake

upside-down cake and skillet cake both are nouns.

Word	Noun	Adjective	Verb	Adverb
upside-down cake	Yes	No	No	No
skillet cake	Yes	No	No	No

As nouns, upside-down cake and skillet cake are synonyms defined as:

upside-down cake and skillet cake: batter baked atop a layer of sweetened fruit then turned upside down so fruit is on top

upside-down cake (noun)	skillet cake (noun)
batter baked atop a layer of sweetened fruit then turned upside down so fruit is on top	batter baked atop a layer of sweetened fruit then turned upside down so fruit is on top