methylthionine chloride vs methylene blue

methylthionine chloride and methylene blue both are nouns.

Word	Noun	Adjective	Verb	Adverb
methylthionine chloride	Yes	No	No	No
methylene blue	Yes	No	No	No

As nouns, methylthionine chloride and methylene blue are synonyms defined as:

methylthionine chloride and methylene blue: a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning

methylthionine chloride (noun)	methylene blue (noun)
a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning	a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning