draft horse
draught horse
dray horse

By all accounts, the system has more bugs than a draft horse in July.

It's going to have a kick like a team of draft horses.

What mystified them both was that the draft horses were still running.

But first, she had to turn Whinney into a draft horse.

With no time to waste, he turned back to Tom, just starting away from securing the lead lines to his big draft horses.

Tom's eyes followed the man as he ran out in front of the big draft horses and stood waiting.

Tom was asleep not too far away right beside his draft horses.

This required the strength, power and endurance of a draft horse.

In fact, it is simply another family characteristic of the draft horse.

The artillery men with their heavy draft horses helped Mars set up the course.