caulking vs caulk

caulking and caulk both are nouns.

Word	Noun	Adjective	Verb	Adverb
caulking	Yes	No	No	No
caulk	Yes	No	Yes	No

As nouns, caulking and caulk are synonyms defined as:

caulking and caulk: a waterproof filler and sealant that is used in building and repair to make watertight

caulking (noun)	caulk (noun)
a waterproof filler and sealant that is used in building and repair to make watertight	a waterproof filler and sealant that is used in building and repair to make watertight

caulking (verb)	caulk (verb)
	seal with caulking