2 Verbs to Use for the Word splutter

Uncle Timothy could hear his distant splutter.

It smokes unpleasantly now and then, splutters and rumbles as if about to obliterate all creation, but for all its bluster it only manages to spill a trickle or two of fresh lava down its sidesjust tamely subsides after deluging Leavitt with a shower of cinders and ashes.

2 Verbs to Use for the Word  splutter