ratlin vs ratline

ratlin and ratline both are nouns.

Word	Noun	Adjective	Verb	Adverb
ratlin	Yes	No	No	No
ratline	Yes	No	No	No

As nouns, ratlin and ratline are synonyms defined as:

ratlin and ratline: (nautical) a small horizontal rope between the shrouds of a sailing ship; they form a ladder for climbing aloft

ratlin (noun)	ratline (noun)
(nautical) a small horizontal rope between the shrouds of a sailing ship; they form a ladder for climbing aloft	(nautical) a small horizontal rope between the shrouds of a sailing ship; they form a ladder for climbing aloft