mooring vs headfast

mooring and headfast both are nouns.

Word	Noun	Adjective	Verb	Adverb
mooring	Yes	No	No	No
headfast	Yes	No	No	No

As nouns, headfast is a hyponym of mooring; that is, headfast is a word with a more specific, narrower meaning than mooring:

mooring: (nautical) a line that holds an object (especially a boat) in place
headfast: a mooring line that secures the bow of a boat or ship to a wharf

mooring (noun)	headfast (noun)
(nautical) a line that holds an object (especially a boat) in place	a mooring line that secures the bow of a boat or ship to a wharf
a place where a craft can be made fast