bump · pump

Same vowel, same ending — the only difference is whether your vocal cords buzz on the very first sound.

bump and pump share the exact same vowel /ʌ/ and the exact same ending /mp/. The only difference is the very first sound — /b/ is voiced (your vocal cords buzz), /p/ is voiceless (just a puff of air, no buzz).

⠿ reorder

A bruised elbow bump, and a speed bump on a road

a small swelling or raised part — 'he got a bump on his head' · 'watch out for the speed bump'

mouth shape

lips press together and pop with a voiced /b/ — vocal cords buzz — then short /ʌ/ like 'cup' — ends /mp/

bump

/bʌmp/

vowel length

short /ʌ/

⠿ reorder

A hand water pump, and someone pumping gas into a car

a device that moves liquid or gas — 'pump the water' · 'stop at the gas pump' — also: to pump iron, pump up

mouth shape

lips press together and pop with a voiceless /p/ — no buzz, just a puff of air — then short /ʌ/ like 'cup' — ends /mp/

pump

/pʌmp/

vowel length

short /ʌ/

Voicing comparison

bump

/b/

VOICED — vocal cords buzz

big, bad, bat, bin

put a hand on your throat — you'll feel a vibration

pump

/p/

VOICELESS — just air

pig, pat, pin, pot

no throat vibration — try it in front of a candle flame

Key difference

bump /bʌmp/: starts voiced — /b/ — vocal cords buzz the moment your lips open. pump /pʌmp/: starts voiceless — /p/ — just a burst of air, no buzz. Everything else — the vowel /ʌ/ and the final /mp/ — is identical.

Example sentences

bump:“I hit a bump in the road and spilled my coffee.”

bump:“She got a small bump on her forehead.”

pump:“Can you pump some air into this tyre?”

Hear it in a sentence

“He got a small bump on his forehead after hitting the cabinet door.”

“She had to pump the tyre twice before it was firm enough to ride on.”

Hear it in the wild

Real speech from native speakers — the most reliable way to check a pronunciation, since automated audio can vary by device and browser.

YouGlish↗

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bump