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normal vs abnormal abnormal vs normal

normal is a noun but abnormal is not a noun.

normal and abnormal both are adjectives.

normal (noun) abnormal (noun)
something regarded as a normative example
normal (adjective) abnormal (adjective)
conforming with or constituting a norm or standard or level or type or social norm; not abnormal not normal; not typical or usual or regular or conforming to a norm
in accordance with scientific laws departing from the normal in e.g. intelligence and development
being approximately average or within certain limits in e.g. intelligence and development much greater than the normal
forming a right angle