WordNet sense 1 (a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)):

crick, rick, wrick

WordNet sense 2 (a sharp bend in a line produced when a line having a loop is pulled tight):

twirl, twist

WordNet sense 3 (curl tightly):

crape, crimp, frizz, frizzle, kink up

WordNet sense 4 (form a curl, curve, or kink):

curl, curve