presumption vs effrontery

presumption and effrontery both are nouns.

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

As nouns, presumption and effrontery are synonyms defined as:

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

Other synonyms of presumption include assumption, presumptuousness.

presumption (noun)	effrontery (noun)
a kind of discourtesy in the form of an act of presuming	audacious (even arrogant) behavior that you have no right to
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