pendant vs lavalliere

pendant and lavalliere both are nouns.

Word	Noun	Adjective	Verb	Adverb
pendant	Yes	Yes	No	No
lavalliere	Yes	No	No	No

As nouns, lavalliere is a hyponym of pendant; that is, lavalliere is a word with a more specific, narrower meaning than pendant:

pendant: an adornment that hangs from a piece of jewelry (necklace or earring)
lavalliere: jeweled pendant worn on a chain around the neck

Other hyponyms of pendant include lavalier, lavaliere.

pendant (noun)	lavalliere (noun)
branched lighting fixture; often ornate; hangs from the ceiling	jeweled pendant worn on a chain around the neck
an adornment that hangs from a piece of jewelry (necklace or earring)

pendant (adjective)	lavalliere (adjective)
held from above and hanging down