plait vs plication

plait and plication both are nouns.

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

As nouns, plication is a hypernym of plait; that is, plication is a word with a broader meaning than plait:

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

Other hypernyms of plait include bend, crease, crimp, flexure, fold.

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

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