gaseous state vs state

gaseous state and state both are nouns.

Word	Noun	Adjective	Verb	Adverb
gaseous state	Yes	No	No	No
state	Yes	No	Yes	No

As nouns, state is a hypernym of gaseous state; that is, state is a word with a broader meaning than gaseous state:

gaseous state: 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
state: (chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container)

Other hypernyms of gaseous state include state of matter.

gaseous state (noun)	state (noun)
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	the way something is with respect to its main attributes
	a politically organized body of people under a single government
	the group of people comprising the government of a sovereign state
	the territory occupied by a nation
	the territory occupied by one of the constituent administrative districts of a nation
	a state of depression or agitation
	(chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container)

gaseous state (verb)	state (verb)
	express in words
	put before
	indicate through a symbol, formula, etc.