humour vs pus

humour and pus both are nouns.

Word	Noun	Adjective	Verb	Adverb
humour	Yes	No	Yes	No
pus	Yes	No	No	No

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

humour (noun)	pus (noun)
the quality of being funny	a fluid product of inflammation
the trait of appreciating (and being able to express) the humorous
the liquid parts of the body
(Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state
a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
a characteristic (habitual or relatively temporary) state of feeling

humour (verb)	pus (verb)
put into a good mood