soman vs G agent

soman and G agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
soman	Yes	No	No	No
G agent	Yes	No	No	No

As nouns, G agent is a hypernym of soman; that is, G agent is a word with a broader meaning than soman:

soman: a nerve agent easily absorbed into the body; a lethal cholinesterase inhibitor that is highly toxic when inhaled
G agent: a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.

Other hypernyms of soman include organophosphate nerve agent, G-series agent, G-series nerve agent.

soman (noun)	G agent (noun)
a nerve agent easily absorbed into the body; a lethal cholinesterase inhibitor that is highly toxic when inhaled	a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.