Noxiously
Part of speech: adverb
Definition: In a noxious manner.
Harmfully
Part of speech: adverb
Definition: In a harmful manner.
Noxiously as an adverb is in a noxious manner. while Harmfully as an adverb is in a harmful manner.
Part of speech: adverb
Definition: In a noxious manner.
Part of speech: adverb
Definition: In a harmful manner.
We hope you now know whether to use Noxiously or Harmfully in your sentence.