pendant vs lavalier

pendant and lavalier both are nouns.

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

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

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

Other hyponyms of pendant include lavaliere, lavalliere.

pendant (noun)	lavalier (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)	lavalier (adjective)
held from above and hanging down