It is synonymous to barbarity, impoliteness, insolence, unmanrliness and impudence.
From the en.wikipedia.org
Hiding behind anonymity, I have found, tends to exacerbate impoliteness.
From the guardian.co.uk
It is very embarrasing as you can imagine, and can even be construed as impoliteness or racism.
From the guardian.co.uk
Its use can also mean rudeness, impoliteness or offensiveness.
From the en.wikipedia.org
For one side to insist on being masked is simply glaring impoliteness and undermines mutual honesty.
From the economist.com
I'm not sure which book of etiquette supplied him with the idea that true impoliteness was pointing out somebody else's rudeness.
From the telegraph.co.uk
A rant does not imply impoliteness.
From the economist.com
Take, for example, the locking up of irreverent youths for slight impoliteness towards the ruler's late, and deified, mother Zarifa.
From the thisismoney.co.uk
When we are on our honeymoon in America next month, maybe we will pull up at the White House, accost POTUS for his impoliteness, then drive off into the sunset.
From the guardian.co.uk
More examples
A discourteous manner that ignores accepted social usage
(impolite) not polite
Rudeness (also called impudence or effrontery) is a display of disrespectfulness by not complying with the social "laws" or etiquette of a group or culture. These laws been established as the essential boundaries of normally accepted behavior. ...