horse vs gymnastic horse

horse and gymnastic horse both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse	Yes	No	Yes	No
gymnastic horse	Yes	No	No	No

As nouns, horse and gymnastic horse are synonyms defined as:

horse (noun)	gymnastic horse (noun)
solid-hoofed herbivorous quadruped domesticated since prehistoric times	a padded gymnastic apparatus on legs
a chessman shaped to resemble the head of a horse; can move two squares horizontally and one vertically (or vice versa)
a framework for holding wood that is being sawed
a padded gymnastic apparatus on legs
troops trained to fight on horseback

horse (verb)	gymnastic horse (verb)
provide with a horse or horses