devil's flax vs butter-and-eggs

devil's flax and butter-and-eggs both are nouns.

Word	Noun	Adjective	Verb	Adverb
devil's flax	Yes	No	No	No
butter-and-eggs	Yes	No	No	No

As nouns, devil's flax and butter-and-eggs are synonyms defined as:

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

Other synonyms of devil's flax include Linaria vulgaris, toadflax, wild snapdragon.

devil's flax (noun)	butter-and-eggs (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