ill humour vs choler

ill humour and choler both are nouns.

Word	Noun	Adjective	Verb	Adverb
ill humour	Yes	No	No	No
choler	Yes	No	No	No

As nouns, choler is a hyponym of ill humour; that is, choler is a word with a more specific, narrower meaning than ill humour:

Other hyponyms of ill humour include moodiness, crossness, fretfulness, fussiness, irritability, peevishness, petulance.

ill humour (noun)	choler (noun)
an angry and disagreeable mood	a humor that was once believed to be secreted by the liver and to cause irritability and anger
	a strong emotion; a feeling that is oriented toward some real or supposed grievance
	an irritable petulant feeling