huntsman's horn vs yellow trumpet

huntsman's horn and yellow trumpet both are nouns.

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

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

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

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

huntsman's horn (noun)	yellow trumpet (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