- relax
- mix
- fix
- tax
- fax
- box
- index
- wax
- coax
- flex
- annex
- telex
- sex
- climax
- perplex
- ax
- multiplex
- vex
- fox
- remix
- hoax
- affix
- sax
- nix
- overtax
- pyx
- xerox
- intermix
- surtax
- refix
- prefix
- lex
- telefax
- triplex
- lux
- jinx
- mutex
- hex
- minimax
- unfix
- bollix
- wex
- transfix
- outfox
- echoplex
- unsex
- sux
- eighty-six
- mux
- pretex
- mux
- malax
- unhex
- coindex
- unlax
- Soundex
- inflex
- geaux
- hit a six
- undertax
- flummox
- rix
- cybersex
- intertex
- chemotax
- unbox
- Netflix
- bemix
- unjinx
- free-mix
- FedEx
- reannex
- max
- complex
- confix
- suplex
- hit someone for six
- immix
- efflux
- hot box
- reflex
- overrelax
- forthwax
- underrelax
- go to Halifax
- interfix
- bolix
- transsex
- soapbox
- flox
- timebox
- flox
- unindex
- black box
- shadow box
- defix
- in-box
- forefix
- overwax
- know someone from Adam's off ox
- code mix
- ax
- dorsiflex
- perfix
- reindex
- shadow-box
- suffix
- brux
- shadowbox
- Charlieplex
- contex
- poleax
- brace abox
- reflux
- enmix
- reaffix
- redox
- deep six
- bollox
- code-mix
- demix
- refax
- yex
- ex
- wax
- demultiplex
- deindex
- pickax
- underfix
- stealth-tax
- embox
- chillax
- detox
- unflex
- admix
- precomplex
- undermix
- get one's shine box
- demux
- premix
- Botox
- downflex
- prophylax
- botox
- sandbox
- dox
- deep-six
- codemix
- poke borax
- blackbox
- outflux
- disannex
- flux
- retax
- connex
- unmix
- de-hex
- outbox
- superfix
- banjax
- præfix
- inbox
- have one's Weetabix
- beatbox
- comix
- elix
- pox
- Brazilian wax
- knock out of the box
- unperplex
- sublux
- doxx
- have sex
- retox
- permix
- untax
- BMX
- postfix
- cox
- hox
- plantarflex
- beeswax
- freemix
- rebox
- sphinx
- Betamax
- commix
- desex
- detax
- dewax
- infix
- kickbox
- fortax
- imbox
- rewax
- dehex
- get a fix
- downmix
- overfix
- rax
- inmix
- card-index
- overmix
- circumfix
- quadruplex
- box
- forwax
- stuff the ballot box
- duplex
- autobox
- XXX
- circumflex
- hotbox
- letterbox
- subfix
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.