spa vs resort hotel

spa and resort hotel both are nouns.

Word	Noun	Adjective	Verb	Adverb
spa	Yes	No	No	No
resort hotel	Yes	No	No	No

As nouns, spa and resort hotel are synonyms defined as:

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