IPA: /ˌsuːpərˈhɛroʊɪn/
KK: /ˈsuːpərˌhɛroʊˌin/
A woman who has special powers and fights for justice, often in a comic book or movie.
Wonder Woman is a famous superheroine known for her strength and bravery.
Superheroine → It is formed from "super-" (meaning above or beyond) and "heroine" (from Greek "heros", meaning a person of distinguished courage or ability, often in a mythological context, with the suffix "-ine" denoting a female). The word "superheroine" refers to a female character who possesses extraordinary abilities and is often depicted as a champion of justice, going beyond the ordinary.
Think of someone who is 'above' ('super-') the ordinary and is a 'female hero' ('heroine') — that's why a superheroine is a female with extraordinary powers.
No commonly confused words.