monkey ladder vs ladder

monkey ladder and ladder both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkey ladder	Yes	No	No	No
ladder	Yes	No	Yes	No

As nouns, ladder is a hypernym of monkey ladder; that is, ladder is a word with a broader meaning than monkey ladder:

monkey ladder: a light ladder to the monkey bridge on a ship
ladder: steps consisting of two parallel members connected by rungs; for climbing up or down

monkey ladder (noun)	ladder (noun)
a light ladder to the monkey bridge on a ship	steps consisting of two parallel members connected by rungs; for climbing up or down
	a row of unravelled stitches
	ascending stages by which somebody or something can progress

monkey ladder (verb)	ladder (verb)
	come unraveled or undone as if by snagging