Crossword puzzle clue "smooth running engine sound"

Here are the possible solutions for smooth running engine sound clue

Answer
Clue
Relevancy
purr
Clue
Smooth-running engine sound
Smooth engine sound
Sound from a smoothly running engine or a happy kitten
Definition
to utter a low, vibrant sound, also PUR
flywheel
Clue
Regulator used to smooth the running of a reciprocating engine
Definition
a heavy disk used in machinery
hum
Clue
Smooth engine sound
Definition
to make a sound like bees
sade
Clue
"Smooth Operator" smooth operator
purrs
Clue
Smooth engine sounds
Definition
PURR, to utter a low, vibrant sound, also PUR
hasslefree
Clue
Smooth-running

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