The part of speech for this particular word is a noun.
Prefixes do not have their own part of speech.
the part of speech for hand is a noun or verb
the part of speech in core is a noun
It is not ANY part of speech, there is no such English word as "stroobly".
Room is a noun.
The word bedroom is a noun. It is a room with the purpose of sleeping in.
Obsolete is an adjective.
"Book" functions as a verb in the phrase "book a room." It is an action that describes reserving or securing a room for a specific purpose or time period.
The word brother is a noun.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
It is the verb of the sentence in past tense.
Adjective