oilstove vs oil heater

oilstove and oil heater both are nouns.

Word	Noun	Adjective	Verb	Adverb
oilstove	Yes	No	No	No
oil heater	Yes	No	No	No

As nouns, oilstove and oil heater are synonyms defined as:

oilstove and oil heater: heater that burns oil (as kerosine) for heating or cooking

Other synonyms of oilstove include kerosene heater, kerosine heater.

oilstove (noun)	oil heater (noun)
heater that burns oil (as kerosine) for heating or cooking	heater that burns oil (as kerosine) for heating or cooking