interpolation vs interposition

interpolation and interposition both are nouns.

Word	Noun	Adjective	Verb	Adverb
interpolation	Yes	No	No	No
interposition	Yes	No	No	No

As nouns, interpolation and interposition are synonyms defined as:

interpolation and interposition: the action of interjecting or interposing an action or remark that interrupts

Other synonyms of interpolation include interjection, interpellation.

interpolation (noun)	interposition (noun)
the action of interjecting or interposing an action or remark that interrupts	the action of interjecting or interposing an action or remark that interrupts
(mathematics) calculation of the value of a function between the values already known	the act or fact of interposing one thing between or among others
a message (spoken or written) that is introduced or inserted