devil's flax vs toadflax

devil's flax and toadflax both are nouns.

Word	Noun	Adjective	Verb	Adverb
devil's flax	Yes	No	No	No
toadflax	Yes	No	No	No

As nouns, devil's flax and toadflax are synonyms defined as:

devil's flax and toadflax: common European perennial having showy yellow and orange flowers; a naturalized weed in North America

Other synonyms of devil's flax include butter-and-eggs, Linaria vulgaris, wild snapdragon.

devil's flax (noun)	toadflax (noun)
common European perennial having showy yellow and orange flowers; a naturalized weed in North America	common European perennial having showy yellow and orange flowers; a naturalized weed in North America