health club vs spa

health club and spa both are nouns.

Word	Noun	Adjective	Verb	Adverb
health club	Yes	No	No	No
spa	Yes	No	No	No

As nouns, health club and spa are synonyms defined as:

health club and spa: a place of business with equipment and facilities for exercising and improving physical fitness

Other synonyms of health club include health spa.

health club (noun)	spa (noun)
a place of business with equipment and facilities for exercising and improving physical fitness	a fashionable hotel usually in a resort area
	a place of business with equipment and facilities for exercising and improving physical fitness
	a health resort near a spring or at the seaside