cockle vs fold up

cockle is a noun but fold up is not a noun.

Word	Noun	Adjective	Verb	Adverb
cockle	Yes	No	Yes	No
fold up	No	No	Yes	No

cockle (noun)	fold up (noun)
common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
common edible European bivalve

cockle (verb)	fold up (verb)
to gather something into small wrinkles or folds	become folded or folded up
stir up (water) so as to form ripples	bend or lay so that one part covers the other