necklet vs ornament

necklet and ornament both are nouns.

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

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

necklet: decoration worn about the neck (fur piece or tight necklace) as an ornament
ornament: something used to beautify

Other hypernyms of necklet include decoration, ornamentation.

necklet (noun)	ornament (noun)
decoration worn about the neck (fur piece or tight necklace) as an ornament	something used to beautify

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