This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of thud.

adj. not clear and resonant; sounding as if striking with or against something relatively soft

"And I remember my heart kind of thudding in my ears as I gathered my nerve to speak."

thudded    thudding    thuds   

scraunch    crunch    crackle    scranch    sound    go    strike    impinge on    hit    collide with   

thudding    thudded   

flump    plunk   

Blood    Bud    Flood    Judd    Rudd    blood    bud    crud    dud    flood   

thump    clatter    rumble    clank    bang    groan    splash    crash    crunch    creak