What part of speech is clangour?

Clangour can be categorized as a noun and a verb.

Parts of speech

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

Verb
clangour - make a loud resonant noise; "the alarm clangored throughout the building"
Noun
clangour - a loud resonant repeating noise; "he could hear the clang of distant bells"