lamp oil vs coal oil

lamp oil and coal oil both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamp oil	Yes	No	No	No
coal oil	Yes	No	No	No

As nouns, lamp oil and coal oil are synonyms defined as:

lamp oil and coal oil: a flammable hydrocarbon oil used as fuel in lamps and heaters

Other synonyms of lamp oil include kerosene, kerosine.

lamp oil (noun)	coal oil (noun)
a flammable hydrocarbon oil used as fuel in lamps and heaters	a flammable hydrocarbon oil used as fuel in lamps and heaters