IPA: /ˈheɪlˌstɔrm/
KK: /heɪlˌstɔrm/
A type of storm that produces small balls or pieces of ice called hail.
The hailstorm damaged many cars and roofs in the neighborhood.
Hailstorm → It is formed from "hail" (from Old English *hægel*, meaning hail or frozen rain) and "storm" (from Old English *storm*, meaning a violent disturbance of the atmosphere). The word "hailstorm" refers to a storm characterized by the presence of hail, which is frozen precipitation.
Think of 'frozen rain' ('hail') coming down during a 'violent disturbance' ('storm') — that's what a hailstorm is.
No commonly confused words.