anchorage vs roadstead

anchorage and roadstead both are nouns.

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

As nouns, roadstead is a hyponym of anchorage; that is, roadstead is a word with a more specific, narrower meaning than anchorage:

Other hyponyms of anchorage include berth, moorage, mooring, slip, roads.

anchorage (noun)	roadstead (noun)
the act of anchoring	a partly sheltered anchorage
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