running suit vs activewear

running suit and activewear both are nouns.

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

As nouns, activewear is a hypernym of running suit; that is, activewear 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
activewear: attire worn for sport or for casual wear

Other hypernyms of running suit include athletic wear, sportswear.

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