horn poppy vs horned poppy

horn poppy and horned poppy both are nouns.

Word	Noun	Adjective	Verb	Adverb
horn poppy	Yes	No	No	No
horned poppy	Yes	No	No	No

As nouns, horn poppy and horned poppy are synonyms defined as:

horn poppy and horned poppy: yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America

Other synonyms of horn poppy include Glaucium flavum, sea poppy, yellow horned poppy.

horn poppy (noun)	horned poppy (noun)
yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America	yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America