mooring vs mooring line

mooring and mooring line both are nouns.

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

As nouns, mooring and mooring line are synonyms defined as:

mooring and mooring line: (nautical) a line that holds an object (especially a boat) in place

mooring (noun)	mooring line (noun)
(nautical) a line that holds an object (especially a boat) in place	(nautical) a line that holds an object (especially a boat) in place
a place where a craft can be made fast