effrontery vs presumption

effrontery and presumption both are nouns.

Word	Noun	Adjective	Verb	Adverb
effrontery	Yes	No	No	No
presumption	Yes	No	No	No

As nouns, effrontery and presumption are synonyms defined as:

effrontery and presumption: audacious (even arrogant) behavior that you have no right to

Other synonyms of effrontery include assumption, presumptuousness.

effrontery (noun)	presumption (noun)
audacious (even arrogant) behavior that you have no right to	a kind of discourtesy in the form of an act of presuming
	audacious (even arrogant) behavior that you have no right to
	an assumption that is taken for granted
	(law) an inference of the truth of a fact from other facts proved or admitted or judicially noticed