prodigy vs prodigious

prodigy is a noun but prodigious is not a noun.

Word	Noun	Adjective	Verb	Adverb
prodigy	Yes	No	No	No
prodigious	No	Yes	No	No

prodigy (noun)	prodigious (noun)
an impressive or wonderful example of a particular quality
a sign of something about to happen
an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration

prodigy (adjective)	prodigious (adjective)
	far beyond what is usual in magnitude or degree
	so great in size or force or extent as to elicit awe
	of momentous or ominous significance