ostler vs stableman

ostler and stableman both are nouns.

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

As nouns, ostler and stableman are synonyms defined as:

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

Other synonyms of ostler include groom, hostler, stableboy.

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