roadstead vs anchorage

roadstead and anchorage both are nouns.

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

As nouns, anchorage is a hypernym of roadstead; that is, anchorage is a word with a broader meaning than roadstead:

Other hypernyms of roadstead include anchorage ground.

roadstead (noun)	anchorage (noun)
a partly sheltered anchorage	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