kerite vs bitumen

kerite and bitumen both are nouns.

Word	Noun	Adjective	Verb	Adverb
kerite	Yes	No	No	No
bitumen	Yes	No	No	No

As nouns, bitumen is a hypernym of kerite; that is, bitumen is a word with a broader meaning than kerite:

kerite: a compound in which tar or asphalt combined with animal or vegetable oils is vulcanized by sulphur, the product closely resembling rubber.
bitumen: any of various naturally occurring impure mixtures of hydrocarbons

kerite (noun)	bitumen (noun)
a compound in which tar or asphalt combined with animal or vegetable oils is vulcanized by sulphur, the product closely resembling rubber.	any of various naturally occurring impure mixtures of hydrocarbons