The word medieval is an adjective. It describes something relating to the Middle Ages.
Millennia is a noun.
Adjective.
Rome is a proper noun. It names a specific city.
The word antediluvian is an adjective. It describes something which is ancient.
Did the people from medieval times play checkers?
The word renaissance is a noun. A renaissance is a revival. It also refers to the time between the medieval and modern time periods.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.