Difference between Disrespectful and Contumelious

DISRESPECTFUL vs CONTUMELIOUS: ADJECTIVE

Rude and discourteous
Exhibiting lack of respect
Synonyms Discourteous, impolite, rude, ungentlemanly, impudent, pert.
Showing disrespect; wanting in respect; manifesting disesteem or want of respect; irreverent; uncivil: as, a disrespectful thought or opinion; disrespectful behavior.

Synonyms 1 and 2. See list under abusive.
Reproachful; shameful; ignominious.
Haughty and contemptuous; disposed to taunt or to insult; insolent; supercilious: said of persons.
Indicating or expressive of contumely; haughtily offensive; contemptuous; insolent; rude and sarcastic: said of acts or things.

Annihilating, Devastating, Impudent, Contumelious, Jeering, Impious, Irreverent, Scornful, Taunting, Disdainful, Derisive, Insolent, Mocking, Contemptuous, Insulting

Annihilating, Devastating, Impudent, Contumelious, Jeering, Impious, Irreverent, Scornful, Taunting, Disdainful, Derisive, Insolent, Mocking, Contemptuous, Insulting

Esau was disrespectful of the honour he held.
Your resentfulness is inappropriate and disrespectful of him.
Would it be disrespectful if I get one?
People are extra disrespectful of a discount store.
The senior care representative was curt and disrespectful.
Great app, but extremely disrespectful of paying customers.
That was disrespectful to the game of football, and disrespectful to all the men who have played the game before him.
The janitors get no respect, students are disrespectful and some leaders are more disrespectful to students.
Cheap, disrespectful clients hang out with other cheap, disrespectful people.
Teacher addresses students in a disrespectful or unfriendly manner and fails to address disrespectful interactions between students.

Disrespect by words may be conveyed by opprobrious epithets or other contumelious or denunciatory language.