dormant vs sleeping

dormant is not a noun while sleeping is a noun.

Word	Noun	Adjective	Verb	Adverb
dormant	No	Yes	No	No
sleeping	Yes	Yes	No	No

As adjectives, dormant and sleeping are synonyms defined as:

dormant (noun)	sleeping (noun)
	the suspension of consciousness and decrease in metabolic rate
	quiet and inactive restfulness
	the state of being asleep

dormant (adjective)	sleeping (adjective)
(of e.g. volcanoes) not erupting and not extinct	lying with head on paws as if sleeping
in a condition of biological rest or suspended animation
inactive but capable of becoming active
lying with head on paws as if sleeping