The word "being" is a verb.
Example functions:
The playground is being painted before school starts. (verb)
A flamingo has long legs because it's a being of the wetlands. (noun)
Their desserts are famous for being perfection. (adjective, describes the noun "perfection")
"Smother", being a word denoting action, is a verb.
The word mobility is a noun. It is the condition of being mobile.
adverb
The word reliability is a noun. It is the quality of being reliable.
The word central is an adjective. It refers to being in the centre of something or being the most important thing.
The part of speech for "authenticity" is a noun. It refers to the quality of being authentic or genuine.
Verb is a part of speech, yes. It is an action. However, as for it being a "speech," I would not know. Speech is a noun, but speak is a verb. :)
The phrase "part of speech" does not contain any verbs.
Verbs show action or state of being.
he has sants in his paints
Verbs denote the action or state of being in a sentence.
"Smother", being a word denoting action, is a verb.
The word mobility is a noun. It is the condition of being mobile.
A perspective is normally a noun, being that it is a thing.
The word remoteness is a noun. It is a state of being remote.
The word tenseness is a noun. It is the characteristic of being tense about something.
The word brusqueness is a noun. It is the act of being brusque.