Class BSame-level trap
míngHSK 7–9
to cry (of birds, animals and insects); to make a sound
共鸣
(physics) to resonate; resonance
The one-stroke difference:鸣 contains 鸟 where 呜 contains 乌 — 鸟 has one extra horizontal stroke near the bottom.
The most confusable look-alike characters in Mandarin — every pair below differs by at most one stroke.