sporting house vs cathouse

sporting house and cathouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
sporting house	Yes	No	No	No
cathouse	Yes	No	No	No

As nouns, sporting house and cathouse are synonyms defined as:

Other synonyms of sporting house include bagnio, bawdyhouse, bordello, brothel, house of ill repute, house of prostitution, whorehouse.

sporting house (noun)	cathouse (noun)
a building where prostitutes are available	a building where prostitutes are available