seal off vs calk

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

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

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

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

seal off (noun)	calk (noun)
	a metal cleat on the bottom front of a horseshoe to prevent slipping

seal off (verb)	calk (verb)
impose a blockade on	injure with a calk
make tight; secure against leakage	seal with caulking
	provide with calks