choking vs breathless

choking is a noun but breathless is not a noun.

Word	Noun	Adjective	Verb	Adverb
choking	Yes	Yes	No	No
breathless	No	Yes	No	No

choking (noun)	breathless (noun)
the act of suffocating (someone) by constricting the windpipe
a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx)

choking (adjective)	breathless (adjective)
causing difficulty in breathing especially through lack of fresh air and presence of heat	not breathing or able to breathe except with difficulty
	appearing dead; not breathing or having no perceptible pulse
	tending to cause suspension of regular breathing