The word supreme is an adjective. It means to have power over everything else.
Yes, supremely is an adverb. It means immensely, or to a great or extraordinary degree.
The part of speech for this particular word is a noun.
part of speech
"Supremely, very good!" in English is Supremamente veramente buono! in Italian.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.