loud vs clarion

loud is not a noun while clarion is a noun.

Word	Noun	Adjective	Verb	Adverb
loud	No	Yes	No	Yes
clarion	Yes	Yes	Yes	No

loud (noun)	clarion (noun)
	a medieval brass instrument with a clear shrill tone

loud (adjective)	clarion (adjective)
characterized by or producing sound of great volume or intensity	loud and clear
(used chiefly as a direction or description in music) indicating that said piece or segment should be played loudly
tastelessly showy

loud (verb)	clarion (verb)
	proclaim on, or as if on, a clarion
	blow the clarion

loud (adverb)	clarion (adverb)
with relatively high volume