turnup vs overlap

turnup and overlap both are nouns.

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

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

turnup: the lap consisting of a turned-back hem encircling the end of the sleeve or leg
overlap: a flap that lies over another part

Other hypernyms of turnup include lap.

turnup (noun)	overlap (noun)
the lap consisting of a turned-back hem encircling the end of the sleeve or leg	a flap that lies over another part
	the property of partial coincidence in time
	a representation of common ground between theories or phenomena

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