funrun vs footrace

funrun and footrace both are nouns.

Word	Noun	Adjective	Verb	Adverb
funrun	Yes	No	No	No
footrace	Yes	No	No	No

As nouns, footrace is a hypernym of funrun; that is, footrace is a word with a broader meaning than funrun:

funrun: a footrace run for fun (often including runners who are sponsored for a charity)
footrace: a race run on foot

Other hypernyms of funrun include foot race, run.

funrun (noun)	footrace (noun)
a footrace run for fun (often including runners who are sponsored for a charity)	a race run on foot