dunlin vs sandpiper

dunlin and sandpiper both are nouns.

Word	Noun	Adjective	Verb	Adverb
dunlin	Yes	No	No	No
sandpiper	Yes	No	No	No

As nouns, sandpiper is a hypernym of dunlin; that is, sandpiper is a word with a broader meaning than dunlin:

dunlin: small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions
sandpiper: any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers

dunlin (noun)	sandpiper (noun)
small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions	any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers