amplitude
asymmetry
billow
billowy
bumpy
corrugated
crease
criss cross
crisscross
curvature
curve
curvy
divider
doodle
edgy
flex
horizontal
irregular
jagged
line
linear
monochrome
parallel
ripple
scrawl
scribble
serrated
simple
sine
sinuous
sinus
squiggle
squiggly
strip
stripe
undulate
undulating
uneven
wave
waving
wavy
wiggle
wiggly
worm
wriggle
wriggling
wriggly
writhe
zig zag
zigzag