pushed (adjective) push–up (noun) push button (noun)

Is the word push an adjective?

PUSHED (adjective) definition and synonyms | Macmillan Dictionary.

What kind of verb is pushed?

[intransitive, transitive] to use your hands, arms, or body in order to make someone or something move forward or away from you; to move part of your body into a particular position We pushed and pushed but the piano wouldn't move.