jack ladder vs pilot ladder

jack ladder and pilot ladder both are nouns.

Word	Noun	Adjective	Verb	Adverb
jack ladder	Yes	No	No	No
pilot ladder	Yes	No	No	No

As nouns, jack ladder and pilot ladder are synonyms defined as:

jack ladder and pilot ladder: (nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps

Other synonyms of jack ladder include Jacob's ladder.

jack ladder (noun)	pilot ladder (noun)
(nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps	(nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps