dyspneal vs smothering

dyspneal and smothering both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dyspneal	No	Yes	No	No
smothering	No	Yes	No	No

dyspneal (adjective)	smothering (adjective)
not breathing or able to breathe except with difficulty	causing difficulty in breathing especially through lack of fresh air and presence of heat