bundle vs bundle up

bundle is a noun but bundle up is not a noun.

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

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

Other synonyms of bundle include roll up.

bundle (noun)	bundle up (noun)
a package of several things tied together for carrying or storing
a collection of things wrapped or boxed together
a large sum of money (especially as pay or profit)

bundle (verb)	bundle up (verb)
sleep fully clothed in the same bed with one's betrothed	dress warmly
make into a bundle	make into a bundle
compress into a wad
gather or cause to gather into a cluster