Short "i" words:
* in
* it
* is
* if
* igloo
* inch
* ill
* into
* island
* iron
* insect
* imp
* invent
* ignore
* imagine
* indigo
* ivy
* itch
* initial
* invisible
* ink
Please note that some words with "i" at the beginning can have different vowel sounds, like "idea" (long "i" sound) or "intense" (long "e" sound).