slipway vs shipway

slipway and shipway both are nouns.

Word	Noun	Adjective	Verb	Adverb
slipway	Yes	No	No	No
shipway	Yes	No	No	No

As nouns, slipway and shipway are synonyms defined as:

slipway and shipway: structure consisting of a sloping way down to the water from the place where ships are built or repaired

Other synonyms of slipway include ways.

slipway (noun)	shipway (noun)
structure consisting of a sloping way down to the water from the place where ships are built or repaired	structure consisting of a sloping way down to the water from the place where ships are built or repaired
	a canal large enough for seagoing vessels