green smut vs false smut

green smut and false smut both are nouns.

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

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

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

green smut (noun)	false 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