As nouns the difference between instalment and insertion
is that instalment is (british|canadian) while insertion is the act of inserting, or something inserted.
instalment
English
Usage notes
* Both spellings common in Commonwealth countries outside the UK.
* US prefers installment.
insertion
Noun
(
en noun)
The act of inserting, or something inserted.
(anatomy) The distal end of attachment of a muscle to a bone that will be moved by the muscle.
(genetics) The addition of a nucleotide to a chromosome by mutation.
Derived terms
* leaf insertion
Antonyms
* (act of inserting) deletion
* (anatomy) origin
* (genetics) deletion