anchorage ground vs anchorage

anchorage ground and anchorage both are nouns.

Word	Noun	Adjective	Verb	Adverb
anchorage ground	Yes	No	No	No
anchorage	Yes	No	No	No

As nouns, anchorage ground and anchorage are synonyms defined as:

anchorage ground (noun)	anchorage (noun)
place for vessels to anchor	the act of anchoring
	place for vessels to anchor
	a fee for anchoring
	the condition of being secured to a base
	the provision of a sense of security or steadfastness