Lifetime's rhymes with:
lifetimes, lifetimes, halftimes, lifetimes, anytime's, centimes, daytimes, halftimes, lifetimes, maritimes, nighttimes, oftentimes, pastimes, showtime's, wartimes
Lifetime's sounds like:
leftwing, leptonic, levitating, levittown's, lifetimes, lifting, lipton's, lufthansa, lufthansa's