mustard agent vs dichloroethyl sulfide

mustard agent and dichloroethyl sulfide both are nouns.

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

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

mustard agent 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 mustard agent include blistering agent, mustard gas, sulfur mustard.

mustard agent (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