running suit vs sportswear

running suit and sportswear both are nouns.

Word	Noun	Adjective	Verb	Adverb
running suit	Yes	No	No	No
sportswear	Yes	No	No	No

As nouns, sportswear is a hypernym of running suit; that is, sportswear is a word with a broader meaning than running suit:

running suit: a matching jacket and pants worn by joggers and made of fabric that absorbs perspiration
sportswear: attire worn for sport or for casual wear

Other hypernyms of running suit include activewear, athletic wear.

running suit (noun)	sportswear (noun)
a matching jacket and pants worn by joggers and made of fabric that absorbs perspiration	attire worn for sport or for casual wear