blackwater vs disease

blackwater and disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackwater	Yes	No	No	No
disease	Yes	No	No	No

As nouns, disease is a hypernym of blackwater; that is, disease is a word with a broader meaning than blackwater:

blackwater: any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells
disease: an impairment of health or a condition of abnormal functioning

blackwater (noun)	disease (noun)
any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells	an impairment of health or a condition of abnormal functioning