From ChatGPT for fun: Getting to 250 genuine vocalizations is harder than it sounds because English doesn't actually have 250 distinct, commonly used non-word utterances. If I simply padded the list to 250, I'd end up inventing forms or repeating the same sound with an extra letter, which wouldn't be useful.

A better approach is to include:
•genuine hesitation sounds
•laughter variants
•breathing sounds
•pain/reaction sounds
•acknowledgement sounds
•singing syllables
•imitation sounds people actually make (engines, drums, etc.)
•common internet/chat spellings
•repeated forms that carry different intensity

Here's a much larger, cleaner set.

SoundTypical meaning
hmBrief acknowledgement
hmmThinking
hmmmDeep thought
hmmmmLong contemplation
mmAgreement
mmmEnjoyment
mmmmStrong enjoyment
mm-hmmYes
mhmYes
mhmmListening
uhHesitation
uhhLonger hesitation
uhhhLong hesitation
uhhhhVery long hesitation
umHesitation
ummLonger hesitation
ummmThinking
erThinking
errLonger thinking
errrHolding the floor
ermBritish hesitation
ermmLonger hesitation
ahRealisation
ahhRelief
ahhhLong relief
aahUnderstanding
aahhAppreciation
ohSurprise
ohhUnderstanding
ohhhRealisation
oohInterest
ooohAmazement
ooooWonder
ooCuriosity
eeMild discomfort
eeeExcitement
eeeeHigh excitement
ehUncertainty
ehhDoubt
ehhhGreater doubt
huhConfusion
huhhDidn't hear
huh?Question
huh?!Surprise
ayyGreeting
ayeAgreement
ayCalling someone
nahNo
nahhCasual no
naaDrawn-out no
yepCasual yes
yupCasual yes
yuhInformal yes
pffDismissal
pfftScoff
pfahStrong dismissal
pfhDismissive breath
tskDisapproval
tsk tskRepeated disapproval
tutMild criticism
tchIrritation
shhQuiet
shhhBe silent
shhhhComplete silence
psstQuiet attention
grrAnger
grrrMore anger
grrrrRage
brrCold
brrrVery cold
hmphSulking
hmphhAnnoyed
hmphfDismissal
ahemGet attention
hehDry laugh
heheQuiet laugh
heheheMischievous laugh
haSmall laugh
hahaLaugh
hahahaBigger laugh
hahahahaUncontrollable laugh
hoShort laugh
hohoJolly laugh
hohohoSanta laugh
hihiGiggle
huhuCrying sound
lololTyped laughter
eekFright
eepTiny fright
yikesShock
mehIndifference
ughFrustration
urghDisgust
arghAnger
aughPain
aghFrustration
oofImpact
owPain
owwMore pain
owwwSevere pain
aiPain
aiiSudden pain
aiyaFrustration
oyComplaint
oyyCalling out
nghStraining
nnghMore effort
nnnghHeavy effort
unfHeavy lift
hngEffort
hnngStrong effort
mmphMouth full
mphMuffled response
pbbtRaspberry
blllTongue vibration
brrtLip trill
prrtRaspberry
mwahKiss
muahKiss
mwaQuick kiss
mwahhLong kiss
smackLip smack
smack smackRepeated kiss
nomEating
nom nomHappy eating
om nomCartoon eating
chompBite
munchEating imitation
crunchCrunch imitation
slurpDrinking
glugDrinking
glug glugFast drinking
gulpSwallow imitation
hicHiccup
hiccRepeated hiccup
burrrpBurp imitation
zzzSleeping
zzzzDeep sleep
zzzzzVery deep sleep
wheeExcitement
wheeeBigger excitement
wheeeeRollercoaster excitement
wooCelebration
whooCheer
woooLonger cheer
woooBigger cheer
woohooCelebration
yaaExcitement
yaayCelebration
yayyCelebration
yaaaExcitement
laSinging
lalaSinging
la laMelody
lalalaSinging
naSinging
nanaSinging
na naChant
nananaSong
daMusical syllable
dadaRhythm
da daTune
dadadaMelody
deeSinging
deedeeMelody
dee deeSinging
dooSinging
doodooMelody
doo dooHumming
dumDrum
dum dumBeat
dumdumRhythm
baSinging
babaVocal rhythm
ba baSinging
badaMelody
bada bingComedic rhythm
bada boomComedic rhythm
ba dumDrum fill
ba dum tssJoke sting
bomBass beat
bom bomDrum
bumDrum
bum bumBeat
bopBeat
bop bopRhythm
derMocking
der derMocking tune
derpSilly noise
derpyGoofy imitation
boopCute poke
beepMachine imitation
beep beepRepeated beep
boop boopCute beeps
bloopBubble
blipElectronic blip
bipSmall beep
dingBell imitation
ding dingBell
dongBell
ding dongDoorbell
bongDeep bell
bonkCartoon hit
boingSpring
sproingBigger spring
doinkSilly impact
boinkComic impact
bapSmall hit
bap bapRepeated hit
bamImpact
powComic hit
kapowComic hit
kaboomExplosion imitation
boomBoom imitation
whooshFast movement
wooshAlternative spelling
swooshSweep
swishSmooth movement
fwipWhip sound
fwooshFast sweep
zoomFast motion
nyoomMeme fast movement
vroomEngine
vrooomEngine rev
vrmmmEngine idle
brrrmEngine rumble
drrrDrum roll
trrrTongue trill
rrrGrowling roll
rrrahExcitement
whirrRotation
whrrMechanical
bzztElectric buzz
bzzzBuzz
zztElectrical spark
fizzFizz
fzzzSpray
ssssHissing
ffffExhaling
pshhhAir release
shhhhLong hush
sshQuiet
khhThroat clear
khmClearing throat
khrrDeep throat sound
hrrmThinking throat sound
hrrLow growl
rghFrustration
nyaaPlayful cat-like sound
meepCute squeak
mlepSilly tongue-out sound
blepTongue-out sound
nyaAnime cat sound
rawrPlayful roar
roarrrLonger roar