Attaboys rhymes with:
busboys, cowboy's, cowboys, cowboys', homeboys, playboy's, schoolboys, alloys, busboys, convoys, cowboy's, cowboys, cowboys', homeboys, playboy's, popejoy's, schoolboys, tolstoy's
Attaboys sounds like:
adapso, additives, adipose, adobe's, advice, advise, advises, advocacy, audiotapes, audiovox, autopsies, autopsy