installment vs episode

installment and episode both are nouns.

Word	Noun	Adjective	Verb	Adverb
installment	Yes	No	No	No
episode	Yes	No	No	No

As nouns, installment and episode are synonyms defined as:

Other synonyms of installment include instalment.

installment (noun)	episode (noun)
the act of installing something (as equipment)	film consisting of a succession of related shots that develop a given subject in a movie
a part of a broadcast serial	a part of a broadcast serial
a part of a published serial	a brief section of a literary or dramatic work that forms part of a connected series
a payment of part of a debt; usually paid at regular intervals	a happening that is distinctive in a series of related events