What part of speech is stopple?

Stopple can be categorized as a noun and a verb.

Parts of speech

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

Verb
stopple - close or secure with or as if with a stopper; "She stoppered the wine bottle"; "The mothers stoppered their babies' mouths with pacifiers"
Noun
stopple - blockage consisting of an object designed to fill a hole tightly