seal off vs caulk

seal off is not a noun while caulk is a noun.

Word	Noun	Adjective	Verb	Adverb
seal off	No	No	Yes	No
caulk	Yes	No	Yes	No

As verbs, caulk is a hyponym of seal off; that is, caulk is a word with a more specific, narrower meaning than seal off:

Other hyponyms of seal off include reseal, waterproof, calk, pack.

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

seal off (verb)	caulk (verb)
impose a blockade on	seal with caulking
make tight; secure against leakage