teargas vs gas

teargas and gas both are nouns.

Word	Noun	Adjective	Verb	Adverb
teargas	Yes	No	Yes	No
gas	Yes	No	Yes	No

As nouns, gas is a hypernym of teargas; that is, gas is a word with a broader meaning than teargas:

teargas: a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds
gas: a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely

Other hypernyms of teargas include chemical weapon.

As verbs, gas is a hypernym of teargas; that is, gas is a word with a broader meaning than teargas:

teargas (noun)	gas (noun)
a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds	a pedal that controls the throttle valve
	the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container
	a state of excessive gas in the alimentary canal
	a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
	a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
	a fossil fuel in the gaseous state; used for cooking and heating homes

teargas (verb)	gas (verb)
attack with teargas; subject to teargas fumes	show off
	attack with gas; subject to gas fumes