normal vs convention

normal and convention both are nouns.

As nouns, normal and convention are synonyms defined as:

Other synonyms of normal include pattern, rule, formula.

normal (noun)	convention (noun)
something regarded as a normative example	a large formal assembly
	something regarded as a normative example
	(diplomacy) an international agreement
	orthodoxy as a consequence of being conventional
	the act of convening

normal (adjective)	convention (adjective)
conforming with or constituting a norm or standard or level or type or social norm; not abnormal
in accordance with scientific laws
being approximately average or within certain limits in e.g. intelligence and development
forming a right angle