Inside Passage vs Inland Passage

Inside Passage and Inland Passage both are nouns.

Word	Noun	Adjective	Verb	Adverb
Inside Passage	Yes	No	No	No
Inland Passage	Yes	No	No	No

As nouns, Inside Passage and Inland Passage are synonyms defined as:

Inside Passage and Inland Passage: a naturally protected waterway from Seattle to Skagway in southeastern Alaska

Inside Passage (noun)	Inland Passage (noun)
a naturally protected waterway from Seattle to Skagway in southeastern Alaska	a naturally protected waterway from Seattle to Skagway in southeastern Alaska