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.
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
"Supremely, very good!" in English is Supremamente veramente buono! in Italian.
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.