Overshadowing rhymes with:
foreshadowing, shadowing, foreshadowing, shadowing, foreshadowing, shadowing, bellowing, billowing, borrowing, burrowing, echoing, following, foreshadowing, harrowing, hollowing, mellowing, narrowing, shadowing, swallowing, vetoing, wallowing, yellowing, zeroing
Overshadowing sounds like:
overexciting, overreacting, overshooting, overstating