derv vs diesel oil

derv and diesel oil both are nouns.

Word	Noun	Adjective	Verb	Adverb
derv	Yes	No	No	No
diesel oil	Yes	No	No	No

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

derv: diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle)
diesel oil: a heavy mineral oil used as fuel in diesel engines

Other hypernyms of derv include diesel fuel.

derv (noun)	diesel oil (noun)
diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle)	a heavy mineral oil used as fuel in diesel engines