false smut vs green smut

false smut and green smut both are nouns.

Word	Noun	Adjective	Verb	Adverb
false smut	Yes	No	No	No
green smut	Yes	No	No	No

As nouns, false smut and green smut are synonyms defined as:

false smut and green smut: disease of rice; grains covered by a green powder consisting of conidia

false smut (noun)	green smut (noun)
disease of rice; grains covered by a green powder consisting of conidia	disease of rice; grains covered by a green powder consisting of conidia