funrun vs fun run

funrun and fun run both are nouns.

Word	Noun	Adjective	Verb	Adverb
funrun	Yes	No	No	No
fun run	Yes	No	No	No

As nouns, funrun and fun run are synonyms defined as:

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

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