12 letters · 16 points in Scrabble
noun behavior that breaches the rule or etiquette or custom or morality
noun not characterized by a fixed principle or rate; at irregular intervals
noun an irregular asymmetry in shape; an irregular spatial pattern
originFrom Middle French irrégularité, from Medieval Latin irregularitas. Morphologically irregular + -ity.
Etymology from Wiktionary, CC BY-SA 3.0