trialling

As nouns the difference between horse and trialling

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 trialling is the running of trial races, especially for horses or greyhounds.

As a verb trialling is

.

As verbs the difference between race and trialling

is that race is while trialling is .

As an adjective race

is distinguished; classy.

As a noun trialling is

the running of trial races, especially for horses or greyhounds.