stableboy vs ostler

stableboy and ostler both are nouns.

Word	Noun	Adjective	Verb	Adverb
stableboy	Yes	No	No	No
ostler	Yes	No	No	No

As nouns, stableboy and ostler are synonyms defined as:

stableboy and ostler: someone employed in a stable to take care of the horses

Other synonyms of stableboy include groom, hostler, stableman.

stableboy (noun)	ostler (noun)
someone employed in a stable to take care of the horses	someone employed in a stable to take care of the horses