smothering vs suffocating

smothering and suffocating both are adjectives.

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

As adjectives, smothering and suffocating are synonyms defined as:

smothering and suffocating: causing difficulty in breathing especially through lack of fresh air and presence of heat

Other synonyms of smothering include choking, suffocative.

smothering (adjective)	suffocating (adjective)
causing difficulty in breathing especially through lack of fresh air and presence of heat	causing difficulty in breathing especially through lack of fresh air and presence of heat