breathless vs choking

breathless is not a noun while choking is a noun.

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

breathless (noun)	choking (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)

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