discourtesy vs offensive activity

discourtesy and offensive activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
discourtesy	Yes	No	No	No
offensive activity	Yes	No	No	No

As nouns, discourtesy and offensive activity are synonyms defined as:

discourtesy and offensive activity: a lack of politeness; a failure to show regard for others; wounding the feelings of others

Other synonyms of discourtesy include offence, offense.

discourtesy (noun)	offensive activity (noun)
a lack of politeness; a failure to show regard for others; wounding the feelings of others	a lack of politeness; a failure to show regard for others; wounding the feelings of others
a manner that is rude and insulting
an expression of lack of respect