Synonyms for Carbon monoxide:

n.

cfc, carbon, chlorofluorocarbon. carbon monoxide (noun)
carbon monoxide gas.
colorless odorless toxic gas (noun)
carbon monoxide gas.
gas (noun)
laughing gas, ether, neon, oxygen, hydrogen, miasma, rarefaction, butane, helium, chlorine, ozone, xenon, argon, methane, nerve gas, acetylene, fume, ethane, carbon dioxide, atmosphere, gas, tear gas, natural gas, vapor, ammonia, nitrogen.
poison (noun)
arsenic, hemlock, antimony, poison, strychnine, cyanide, ptomaine.
substance (noun)
carbon monoxide gas.

Other synonyms:

mustard gas. carbon. Other relevant words:
carbon monoxide gas.