IPA: //ˈpærətruːp//
KK: /ˈpærəˌtrup/
A group of soldiers trained to jump from airplanes and fight on the ground.
The paratroop unit was deployed to assist in the rescue operation.
Paratroop → It is formed from "para-" (meaning alongside or beyond) and "troop" (from Old French *troupe*, meaning a group of soldiers). The word refers to soldiers who are dropped from aircraft to land alongside or beyond enemy lines.
Think of soldiers landing 'alongside' ('para-') in a 'group' ('troop') — that's what paratroop means.
No commonly confused words.