lappet vs overlap

lappet and overlap both are nouns.

Word	Noun	Adjective	Verb	Adverb
lappet	Yes	No	No	No
overlap	Yes	No	Yes	No

As nouns, overlap is a hypernym of lappet; that is, overlap is a word with a broader meaning than lappet:

Other hypernyms of lappet include lap.

lappet (noun)	overlap (noun)
medium-sized hairy moths; larvae are lappet caterpillars	a flap that lies over another part
a small lap on a garment or headdress	the property of partial coincidence in time
a fleshy wrinkled and often brightly colored fold of skin hanging from the neck or throat of certain birds (chickens and turkeys) or lizards	a representation of common ground between theories or phenomena

lappet (verb)	overlap (verb)
	extend over and cover a part of
	coincide partially or wholly