trialler

As a noun trialler is

a horse used for trialling.

As a noun trialler

is a horse used for trialling.

As a verb trialled is

(trial).

As nouns the difference between triller and trialler

is that triller is a small passerine bird of the genus lalage belonging to the cuckoo-shrike family campephagidae, so called because of the loud trilling calls of the male birds while trialler is a horse used for trialling.

As nouns the difference between trialling and trialler

is that trialling is the running of trial races, especially for horses or greyhounds while trialler is a horse used for trialling.

As a verb trialling

is .

As nouns the difference between horse and trialler

is that horse is a poker variant consisting of five different poker variants, with the rules changing from one variant to the next after every hand or horse can be (variant of basketball) while trialler is a horse used for trialling.