plication vs plait

plication and plait both are nouns.

Word	Noun	Adjective	Verb	Adverb
plication	Yes	No	No	No
plait	Yes	No	Yes	No

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

plication: an angular or rounded shape made by folding
plait: any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape

Other hyponyms of plication include pleat, kink, twirl, twist, pucker, ruck, accordion fold, concertina fold, z-fold, zig-zag fold.

plication (noun)	plait (noun)
the act of folding in parallel folds	any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape
an angular or rounded shape made by folding	a hairdo formed by braiding or twisting the hair

plication (verb)	plait (verb)
	weave into plaits
	make by braiding or interlacing