"Repetitious means “full of or characterized by repetitions” and especially “boring or tedious repetitions,” as in Her conversation was silly and repetitious. Repetitive simply means “characterized by repetitions”: Making these wooden handles involved several repetitive procedures on the lathe. Had the procedures also been repetitious, the worker would almost certainly have found them tedious; that they were repetitive does not insist on their tediousness."
http://www.bartleby.com/68/2/5102.html
I love that. A pair of onomatapaeic homonyms. And 'Onomatapaeic homonym' is a Googlewhack (or was until this post). This is a great day.