rend vs rip

rend is not a noun while rip is a noun.

Word	Noun	Adjective	Verb	Adverb
rend	No	No	Yes	No
rip	Yes	No	Yes	No

As verbs, rend and rip are synonyms defined as:

Other synonyms of rend include pull, rive.

rend (noun)	rip (noun)
	the act of rending or ripping or splitting something
	a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current
	an opening made forcibly as by pulling apart
	a dissolute man in fashionable society

rend (verb)	rip (verb)
tear or be torn violently	criticize or abuse strongly and violently
	tear or be torn violently
	cut (wood) along the grain
	move precipitously or violently
	take without the owner's consent