G-series agent vs sarin

G-series agent and sarin both are nouns.

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

As nouns, sarin is a hyponym of G-series agent; that is, sarin is a word with a more specific, narrower meaning than G-series agent:

G-series agent: a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.
sarin: a highly toxic chemical nerve agent that inhibits the activity of cholinesterase

Other hyponyms of G-series agent include GB, GD, soman, GA, tabun.

G-series agent (noun)	sarin (noun)
a non-persistent nerve agent discovered and synthesized during or prior to World War II by Dr. Gerhard Schrader.	a highly toxic chemical nerve agent that inhibits the activity of cholinesterase