G agent vs sarin

G agent and sarin both are nouns.

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

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

G 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 agent include GB, GD, soman, GA, tabun.

G 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