yellow trumpet vs huntsman's horn

yellow trumpet and huntsman's horn both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow trumpet	Yes	No	No	No
huntsman's horn	Yes	No	No	No

As nouns, yellow trumpet and huntsman's horn are synonyms defined as:

yellow trumpet and huntsman's horn: pitcher plant of southeastern United States having erect yellow trumpet-shaped pitchers with wide mouths and erect lids

Other synonyms of yellow trumpet include huntsman's horns, Sarracenia flava, trumpets, yellow pitcher plant.

yellow trumpet (noun)	huntsman's horn (noun)
pitcher plant of southeastern United States having erect yellow trumpet-shaped pitchers with wide mouths and erect lids	pitcher plant of southeastern United States having erect yellow trumpet-shaped pitchers with wide mouths and erect lids