Welsh rarebit vs rarebit

Welsh rarebit and rarebit both are nouns.

Word	Noun	Adjective	Verb	Adverb
Welsh rarebit	Yes	No	No	No
rarebit	Yes	No	No	No

As nouns, Welsh rarebit and rarebit are synonyms defined as:

Welsh rarebit and rarebit: cheese melted with ale or beer served over toast

Other synonyms of Welsh rarebit include Welsh rabbit.

Welsh rarebit (noun)	rarebit (noun)
cheese melted with ale or beer served over toast	cheese melted with ale or beer served over toast