- mmm
- aaa
- xxx
- mmmm
- hmmm
- oooh
- ooo
- shhh
- sssh
- ooooh
- aaargh
- pssst
- sss
- grrrr
- zzz
- nooo
- yeees
- baaa
- baaad
- www
- aaagh
- aieee
- brrring
- bzzz
- crosssection
- wwwww
- A-III
- AAA
- AAA-CPA
- AAAA
- AAAAI
- AAAAM
- AAAANZ
- AAAB
- AAAC
- AAACE
- AAAD
- AAAE
- AAAEE
- AAAH
- AAAI
- AAAID
- AAAIMH
- AAAIP
- AAAIS
- AAAIWA
- AAALAC
- AAAM
- AAAN
- AAAOC
- AAAR
- AAARC
- AAARG
- AAAS
- AAASA
- AAASS
- AAASUSS
- AAAV
- aaawesome
- ABCCC
- ALLL
- Amerikkka
- AmeriKKKa
- Amerikkkan
- ballless
- BBB
- BBBB
- BBBJ
- belllike
- biiig
- billlike
- brmmm
- brrr
- bulllike
- buuut
- bzzzt
- CCC
- CCCC
- CCCP
- cooold
- cuuute
- DDD
- DDMMYYYY
- deeeath
- deliciousss
- demokkkracy
- duuumb
- eeevil
- eeew
- faaan
- faaanish
- fuuuck
- GGG
- gillless
- goddessship
- goooooo
- governessship
- greeeat
- grrr
- grrrl
- headmistressship
- heeelp
- heeey
- Henry VIII clause
- hilllike
- hostessship
- huuuge
- hysterosalpingooophorectomy
- IEEE
- IFTTT
- illlit
- Invernessshire
- iron(III) chloride
- iron(III) oxide
- iron(III) sulfate
- Jeeesus
- JJJ
- Kinrossshire
- KKK
- KKKer
- KKKonfederate
- laaarge
- Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch
- LLLP
- looove
- looovely
- Merikkka
- mistressship
- MPPP
- 'Murikkka
- NIAAA
- niiice
- nooow
- offfield
- OOO
- OoO
- oooooh
- pfff
- PIIIGS
- pleeease
- PPP
- PPPoA
- PPPoE
- PPPS
- PUPPP
- reaaal
- realll
- reeeaaal
- reeeady
- reeeal
- riot grrrl
- rrreal
- salpingooophorectomy
- salpingooophoritis
- scaaared
- scaaary
- seeexy
- shellless
- shelllike
- SHHH
- shiiit
- skillless
- skilllessness
- skulllike
- skweee
- smaaall
- smaaart
- Sol III
- Sol VIII
- SQRRR
- SSS
- SSSI
- SSSS
- stooop
- stuuupid
- suuure
- taaall
- teeerrible
- tiiiny
- trolllike
- TTT
- TTTO
- TTTT
- unlesss
- USSS
- veeery
- verrry
- vertuuus
- WAGGGS
- wallless
- walllike
- WEEE
- whrrr
- willless
- willlessness
- WKKK
- wooonderful
- World War III
- wrooong
- WWIII
- WWW
- WWWWW
- XXX
- XXXL
- XXXX
- yesss
- zzzs
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.