sprig vs ornament

sprig and ornament both are nouns.

Word	Noun	Adjective	Verb	Adverb
sprig	Yes	No	No	No
ornament	Yes	No	Yes	No

As nouns, ornament is a hypernym of sprig; that is, ornament is a word with a broader meaning than sprig:

Other hypernyms of sprig include decoration, ornamentation.

sprig (noun)	ornament (noun)
an ornament that resembles a spray of leaves or flowers	something used to beautify
a small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year

sprig (verb)	ornament (verb)
	make more attractive by adding ornament, colour, etc.
	be an ornament to