Alaska crab vs king crab

Alaska crab and king crab both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alaska crab	Yes	No	No	No
king crab	Yes	No	No	No

As nouns, Alaska crab and king crab are synonyms defined as:

Alaska crab and king crab: large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan

Other synonyms of Alaska crab include Alaska king crab, Alaskan king crab, Paralithodes camtschatica.

As nouns, Alaska crab and king crab are synonyms defined as:

Alaska crab and king crab: meat of large cold-water crab; mainly leg meat

Other synonyms of Alaska crab include Alaska king crab, Alaskan king crab.

Alaska crab (noun)	king crab (noun)
large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan	large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan
meat of large cold-water crab; mainly leg meat	large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse
	a large spider crab of Europe
	meat of large cold-water crab; mainly leg meat