stove vs sawdust stove

stove and sawdust stove both are nouns.

Word	Noun	Adjective	Verb	Adverb
stove	Yes	No	No	No
sawdust stove	Yes	No	No	No

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

stove: any heating apparatus
sawdust stove: a stove that is cheap and easy to make, burns either free or low-cost fuel.

Other hyponyms of stove include slow-burning stove.

stove (noun)	sawdust stove (noun)
any heating apparatus	a stove that is cheap and easy to make, burns either free or low-cost fuel.
a kitchen appliance used for cooking food