plication vs ruck

plication and ruck both are nouns.

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

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

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

plication (noun)	ruck (noun)
the act of folding in parallel folds	a crowd especially of ordinary or undistinguished persons or things
an angular or rounded shape made by folding	an irregular fold in an otherwise even surface (as in cloth)

plication (verb)	ruck (verb)
	become wrinkled or drawn together