Synonyms for cockle

Most common

1. Pucker

pucker, knit, crumple, rumple

2. Ruffle

ruffle, riffle, ripple, undulate

Other

wrinkle, corrugate

v. 1
To cause to contract into wrinkles or ridges, as some kinds of cloth after a wetting; to pucker.
v. 2
To wobble, shake; to be unsteady.
n. 1
Any of various edible European bivalve mollusks, of the family Cardiidae, having heart-shaped shells.

Plural: cockles → darnels…
Past participle: cockled
e.g. cockled → puckered, knitted, crumpled, rumpled…

Use in printed books, per decade from 1850 to 2019.

The small number after each word is its number of syllables (ripple² = 2 syllables).