huntsman's horns vs huntsman's horn

huntsman's horns and huntsman's horn both are nouns.

Word	Noun	Adjective	Verb	Adverb
huntsman's horns	Yes	No	No	No
huntsman's horn	Yes	No	No	No

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

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

huntsman's horns (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