sulfur mustard vs dichloroethyl sulfide

sulfur mustard and dichloroethyl sulfide both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfur mustard	Yes	No	No	No
dichloroethyl sulfide	Yes	No	No	No

As nouns, sulfur mustard and dichloroethyl sulfide are synonyms defined as:

sulfur mustard and dichloroethyl sulfide: a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote

Other synonyms of sulfur mustard include blistering agent, mustard agent, mustard gas.

sulfur mustard (noun)	dichloroethyl sulfide (noun)
a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote	a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote