whistler vs marmot

whistler and marmot both are nouns.

Word	Noun	Adjective	Verb	Adverb
whistler	Yes	No	No	No
marmot	Yes	No	No	No

As nouns, marmot is a hypernym of whistler; that is, marmot is a word with a broader meaning than whistler:

whistler: large North American mountain marmot
marmot: stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter

whistler (noun)	marmot (noun)
Australian and southeastern Asian birds with a melodious whistling call	stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter
large-headed swift-flying diving duck of Arctic regions
large North American mountain marmot
someone who makes a loud high sound