paraffin oil vs kerosene

paraffin oil and kerosene both are nouns.

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

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

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

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