health spa vs spa

health spa and spa both are nouns.

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

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

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

Other synonyms of health spa include health club.

health spa (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