Clacked, past participle of clack. Synonyms in the same form.
Prattle
prattled, palavered, chattered, cackled, prated, jabbered, tittle-tattled, babbled, gossiped, tattled, blabbed, blabbered, waffled, twaddled, gabbed, gabbled, piffled, gibbered, mandered, rambled, blathered, nattered
Clatter
clattered, brattled, rattled
Click
clicked, clucked
Other
snapped, cracked
All synonyms for clack →