serial vs instalment

serial and instalment both are nouns.

Word	Noun	Adjective	Verb	Adverb
serial	Yes	Yes	No	No
instalment	Yes	No	No	No

serial (noun)	instalment (noun)
a serialized set of programs	the act of installing something (as equipment)
a periodical that appears at scheduled times	a part of a broadcast serial
	a part of a published serial

serial (adjective)	instalment (adjective)
pertaining to or occurring in or producing a series
pertaining to or composed in serial technique
of or relating to the sequential performance of multiple operations
in regular succession without gaps