normal vs sane

normal is a noun but sane is not a noun.

normal (noun)	sane (noun)
something regarded as a normative example

normal (adjective)	sane (adjective)
conforming with or constituting a norm or standard or level or type or social norm; not abnormal	mentally healthy; free from mental disorder
in accordance with scientific laws	marked by sound judgment; having good reason
being approximately average or within certain limits in e.g. intelligence and development
forming a right angle