What part of speech is splutter?

Splutter can be categorized as a noun and a verb.

Parts of speech

1. splutter is a verb, present, 1st person singular of splutter (infinitive).
2. splutter is a verb (infinitive).
3. splutter is a noun, singular of splutters.

Verb
splutter - spit up in an explosive manner
splutter - utter with a spitting sound, as if in a rage
Noun
splutter - A confused noise, as of hasty speaking.