horn poppy vs yellow horned poppy

horn poppy and yellow horned poppy both are nouns.

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

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

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

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

horn poppy (noun)	yellow 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