Defn: A stop; a halt; a moderation of pace.
There is no ho with them. Decker.

HO; HOA
Ho, Hoa, interj. Etym: [Cf. F. & G. ho.]

1. Halloo! attend! — a call to excite attention, or to give notice of approach. "What noise there, ho" Shak. "Ho! who's within" Shak.

2. Etym: [Perhaps corrupted fr. hold; but cf. F. hau stop! and E. whoa.]

Defn: Stop! stand still! hold! — a word now used by teamsters, but
formerly to order the cessation of anything. [Written also whoa, and,
formerly, hoo.]
The duke . . . pulled out his sword and cried "Hoo!" Chaucer.
An herald on a scaffold made an hoo. Chaucer.

HOAR
Hoar, a. Etym: [OE. hor, har, AS. har; akin to Icel. harr, and to
OHG. her illustrious, magnificent; cf. Icel. Heiedh brightness of the
sky, Goth. hais torch, Skr. ketus light, torch. Cf. Hoary.]

1. White, or grayish white: as, hoar frost; hoar cliffs. "Hoar waters." Spenser.

2. Gray or white with age; hoary. Whose beard with age is hoar. Coleridge. Old trees with trunks all hoar. Byron.

3. Musty; moldy; stale. [Obs.] Shak.

HOAR
Hoar, n.