discourtesy vs ridicule

discourtesy and ridicule both are nouns.

Word	Noun	Adjective	Verb	Adverb
discourtesy	Yes	No	No	No
ridicule	Yes	No	Yes	No

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

discourtesy: a lack of politeness; a failure to show regard for others; wounding the feelings of others
ridicule: the act of deriding or treating with contempt

Other hyponyms of discourtesy include derision, indelicacy, insolence, affront, insult, presumption, rebuff, slight.

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

discourtesy (noun)	ridicule (noun)
a lack of politeness; a failure to show regard for others; wounding the feelings of others	the act of deriding or treating with contempt
a manner that is rude and insulting	language or behavior intended to mock or humiliate
an expression of lack of respect

discourtesy (verb)	ridicule (verb)
	subject to laughter or ridicule