kink vs kink up

kink is a noun but kink up is not a noun.

Word	Noun	Adjective	Verb	Adverb
kink	Yes	No	Yes	No
kink up	No	No	Yes	No

As verbs, kink and kink up are synonyms defined as:

Other synonyms of kink include crape, crimp, frizz, frizzle.

kink (noun)	kink up (noun)
a difficulty or flaw in a plan or operation
an eccentric idea
a person with unusual sexual tastes
a sharp bend in a line produced when a line having a loop is pulled tight
a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)

kink (verb)	kink up (verb)
form a curl, curve, or kink	curl tightly
curl tightly