1. Ack ack was rated #44 among the top 100 American racehorses of the 20th century by a panel of experts assembled by The Blood-Horse (Thoroughbred Champions, Eclipse Press, 7th printing, 2005)

2. A-cock-horse absterse accerse accourse accurse acorse acourse acurse adverse afforse after-course agerse ahorse alerse animadverse anniverse antrorse arse asperse auto-reverse averse barge-course barse bat-horse bathorse bawhorse Behearse berse beverse birse block-in-course block-universe blood-horse bouleverse bourse