offensive activity vs discourtesy

offensive activity and discourtesy both are nouns.

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

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

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

Other synonyms of offensive activity include offence, offense.

offensive activity (noun)	discourtesy (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