rodent vs marmot

rodent and marmot both are nouns.

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

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

rodent: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
marmot: stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter

rodent (noun)	marmot (noun)
relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing	stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter