worrisome vs worrying

worrisome is not a noun while worrying is a noun.

Word	Noun	Adjective	Verb	Adverb
worrisome	No	Yes	No	No
worrying	Yes	Yes	No	No

As adjectives, worrisome and worrying are synonyms defined as:

Other synonyms of worrisome include distressful, distressing, disturbing, perturbing, troubling.

worrisome (noun)	worrying (noun)
	the act of harassing someone
	the act of moving something by repeated tugs or pushes

worrisome (adjective)	worrying (adjective)
not reassuring; tending to cause anxiety	causing distress or worry or anxiety
causing distress or worry or anxiety