A new user is preparing a class for 7-9 in English with the game Word Muddle

The definition of horse

Synonyms:	nag, mount, mare, colt, filly, stallion, gelding, jade, pony, yearling, steed (archaic literary), dobbin, moke (Austral. slang), hobby (archaic dialect), clown, misbehave, roughhouse (slang)

From Collins