tetrachlorethylene vs tetrachloroethylene

tetrachlorethylene and tetrachloroethylene both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetrachlorethylene	Yes	No	No	No
tetrachloroethylene	Yes	No	No	No

As nouns, tetrachlorethylene and tetrachloroethylene are synonyms defined as:

tetrachlorethylene and tetrachloroethylene: anthelmintic agent used against hookworm and other nematodes

Other synonyms of tetrachlorethylene include carbon dichloride, ethylene tetrachloride.

tetrachlorethylene (noun)	tetrachloroethylene (noun)
anthelmintic agent used against hookworm and other nematodes	anthelmintic agent used against hookworm and other nematodes