lavalliere vs pendant

lavalliere and pendant both are nouns.

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

As nouns, pendant is a hypernym of lavalliere; that is, pendant is a word with a broader meaning than lavalliere:

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

Other hypernyms of lavalliere include pendent.

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

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