paraffin oil vs coal oil

paraffin oil and coal oil both are nouns.

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

As nouns, coal oil is a hypernym of paraffin oil; that is, coal oil is a word with a broader meaning than paraffin oil:

Other hypernyms of paraffin oil include kerosene, kerosine, lamp oil.

paraffin oil (noun)	coal oil (noun)
(British usage) kerosine	a flammable hydrocarbon oil used as fuel in lamps and heaters