graving dock vs dry dock

graving dock and dry dock both are nouns.

Word	Noun	Adjective	Verb	Adverb
graving dock	Yes	No	No	No
dry dock	Yes	No	No	No

As nouns, graving dock and dry dock are synonyms defined as:

graving dock and dry dock: a large dock from which water can be pumped out; used for building ships or for repairing a ship below its waterline

Other synonyms of graving dock include drydock.

graving dock (noun)	dry dock (noun)
a large dock from which water can be pumped out; used for building ships or for repairing a ship below its waterline	a large dock from which water can be pumped out; used for building ships or for repairing a ship below its waterline