Common words:
* bit
* hit
* fit
* quit
* sit
* spit
* knit
* grit
* lit
* pit
* wit
* emit
* permit
* submit
* commit
* limit
Less common words:
* blit (to strike quickly)
* chit (a note or token)
* ditt (a saying or proverb)
* flit (to move quickly and lightly)
* git (a person who is regarded as foolish or inept)
* kit (a set of tools or equipment)
* smit (to strike or affect suddenly, as with a feeling)
* whit (a small amount)
* blithe (happy and carefree)
* blitzkrieg (a swift and overwhelming military attack)
Nouns:
* benefit
* spirit
* merit
* habit
* audit
* orbit
* exit
* transit
Verbs:
* edit
* visit
* posit
* solicit
* transmit
This list is not exhaustive, but it provides a good starting point.
Remember, the ending "it" is not exclusive to English words. You can also find words ending in "it" in other languages.