trotting horse vs bangtail

trotting horse and bangtail both are nouns.

Word	Noun	Adjective	Verb	Adverb
trotting horse	Yes	No	No	No
bangtail	Yes	No	No	No

As nouns, bangtail is a hypernym of trotting horse; that is, bangtail is a word with a broader meaning than trotting horse:

trotting horse: a horse trained to trot; especially a horse trained for harness racing
bangtail: a horse bred for racing

Other hypernyms of trotting horse include race horse, racehorse.

trotting horse (noun)	bangtail (noun)
a horse trained to trot; especially a horse trained for harness racing	a horse bred for racing