What part of speech is enthrone?

Enthrone can be categorized as a verb.

Parts of speech

1. enthrone is a verb, present, 1st person singular of enthrone (infinitive).
2. enthrone is a verb (infinitive).

Verb
enthrone - put a monarch on the throne; "The Queen was enthroned more than 50 years ago"
enthrone - provide with power and authority; "They vested the council with special rights"