G agent vs G-series agent

G agent and G-series agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
G agent	Yes	No	No	No
G-series agent	Yes	No	No	No

As nouns, G agent and G-series agent are synonyms defined as:

G agent and G-series agent: a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.

Other synonyms of G agent include G-series nerve agent.

G agent (noun)	G-series agent (noun)
a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.	a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.