horse vs trestle

horse and trestle both are nouns.

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

As nouns, trestle is a hyponym of horse; that is, trestle is a word with a more specific, narrower meaning than horse:

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

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