Challenger's rhymes with:
challengers, challengers, challengers, challengers, linenger's, messengers, passenger's, passengers, passengers', scavengers
Challenger's sounds like:
challengers, cleansers, clunkers, colonizers
challengers, challengers, challengers, challengers, linenger's, messengers, passenger's, passengers, passengers', scavengers
challengers, cleansers, clunkers, colonizers