6 letters

Guadix sandix perdix subfix ∙ prefix ∙ suffix ∙ confix ∙ perfix Obelix Buglix bollix ∙ rollix prolix ∙ premix ∙ commix ∙ permix vermix chenix ∙ Phenix ∙ darnix marnix vernix ∙ cornix fornix ∙ turnix matrix ∙ natrix patrix tetrix ultrix motrix tutrix ∙ Mastix ∙ tettix ∙ cervix ∙ Sizzix caranx sphinx ∙ meninx ∙ spninx myrinx syrinx ∙ Sphynx ∙ larynx ∙ teabox ∙ Icebox ∙ pegbox ∙ funbox tarbox Airbox hatbox ∙ Hotbox ∙ outbox ∙ jawbox ∙ haybox ∙ paybox skybox ∙ precox Maddox neodox Seafox dogfox ∙ colfox carfox ∙ outfox ∙ heliox demiox Hickox muskox ∙ Maalox Avelox bollox ∙ Diamox Clamox Acimox Trimox Lummox ∙ Penmox Winmox Biomox Vermox Posmox magnox ∙ Drinox Lennox pappox cowpox ∙ Eferox approx anatox Volvox ∙ boyaux ∙ adieux ∙ Pateux Bayeux Soyeux deflux reflux ∙ afflux ∙ efflux ∙ influx ∙ hallux ∙ Pollux isolux bijoux ∙ Bombyx ∙ coccyx ∙ sandyx larnyx Pteryx

7 letters

Abracax efficax broadax ∙ datafax telefax ∙ Halifax Equifax Filofax Fairfax panchax ∙ breakax aspalax Triplax overlax ∙ curtlax Gravlax ∙ panamax Fosamax Betamax Minimax ∙ varimax Coolmax Thermax thrinax Zenapax carapax ∙ anthrax ∙ zovirax Sycorax abrasax ∙ antitax ∙ overtax ∙ posttax ∙ Varivax Kremvax Durawax woadwax ∙ woodwax ∙ treewax ∙ packwax ∙ sealwax ∙ beeswax ∙ Zoladex Humidex ∙ spandex ∙ deindex ∙ reindex ∙ Noindex Demodex Semodex Tomudex Tubifex ∙ munifex aurifex artifex narthex ∙ Benelex Preflex diaplex uniplex triplex ∙ Zziplex simplex ∙ complex ∙ funplex ∙ apoplex ∙ proplex supplex perplex ∙ Hysplex Kleenex ∙ Efpinex Actinex reannex ∙ unannex coannex ∙ Nasonex Vivonex antapex Perspex ∙ aruspex ∙ Mandrex panorex Imitrex Kantrex centrex antisex ∙ homosex ∙ Imposex teletex ∙ Mobitex Decitex Celotex ∙ Kilotex Subutex Activex Roubaix scandix Valleix Dupleix antefix ∙ reaffix ∙ overfix postfix ∙ pemphix ∙ infelix bordmix Casemix overmix ∙ choenix ∙ phoenix ∙ Pheonix Delonix chamoix ∙ Coolpix tamarix Esidrix Perdrix Asterix twinrix Beatrix oratrix ∙ factrix rectrix ∙ tectrix ∙ victrix ∙ doctrix editrix ∙ liotrix martrix tortrix ∙ distrix ∙ pistrix hystrix Chantix Diastix skeezix phalanx ∙ outjinx ∙ salpinx ∙ pharynx ∙ Headbox deedbox feedbox ∙ seedbox ∙ bandbox ∙ Sandbox ∙ woodbox ∙ dicebox sidebox cakebox Jukebox ∙ Axlebox shoebox ∙ farebox ∙ Firebox ∙ corebox casebox Bluebox livebox cashbox ∙ jackbox kickbox ∙ lockbox ∙ talkbox ∙ sinkbox workbox ∙ coalbox ∙ mailbox ∙ hellbox ∙ pillbox ∙ Toolbox ∙ boombox ∙ soapbox ∙ gearbox ∙ Beatbox ∙ Softbox spitbox saltbox ∙ Nestbox postbox ∙ dustbox showbox ∙ playbox Fuzzbox praecox princox ∙ Simpcox paradox ∙ cacodox homodox LipoDox carefox werefox Firefox Octalox Robamox Alfamox Ibiamox Velamox Cilamox Penamox Ospamox Piramox Fisamox Abdimox Medimox glommox Flummox ∙ Vlummox Polymox equinox ∙ Entonox Tanapox kinepox milkpox fowlpox ∙ goatpox wartpox Eutirox Chlorox Anaprox Zerrsox Quintox auxotox televox sonovox ∙ TAILORx Lascaux cadeaux ∙ radeaux agneaux bureaux ∙ reseaux ∙ ciseaux bateaux ∙ gateaux ∙ coteaux ∙ Puteaux Laffaux margaux Tillaux vitraux ∙ chevaux jambeux ∙ milieux ∙ Lisieux affreux Évreux Nerveux benelux conflux ∙ nonflux Amoflux outflux vaudoux ∙ Mantoux Erbitux Trionyx acronyx mesonyx ictonyx apteryx ∙ bostryx ∙

8 letters

curtalax ∙ toadflax ∙ parallax ∙ Polyplax Stenomax PolarMax supermax ∙ Contumax opopanax ∙ Astyanax pertinax opoponax Hipponax scolopax saxifrax perborax undertax ∙ Supertax ∙ aftertax ∙ microvax chafewax chaffwax earthwax ∙ greenwax Sephadex Nolvadex Arimidex subindex ∙ Faslodex spinifex ∙ carnifex ∙ pontifex ∙ pHisoHex Paraflex Vitaflex irreflex anteflex semiflex genuflex supellex megaplex ∙ quadplex ∙ Cineplex ∙ exciplex veniplex Atriplex echoplex fourplex ∙ octuplex ∙ preannex disannex ∙ periapex extispex haruspex ∙ Celebrex neosorex Mifeprex interrex ∙ Dobutrex Amoxtrex cybersex ∙ supersex ∙ intersex ∙ Sympatex videotex ∙ Audiotex intertex biconvex ∙ Weetabix Vectibix appendix ∙ coxendix intrafix crucifix ∙ superfix ∙ transfix ∙ anthelix ∙ abarelix unprolix Notaulix Clinimix intermix ∙ Chamonix coturnix ∙ mirepoix ∙ Abatvoix Cervarix Dieldrix liothrix Ulothrix Albiorix Ambiorix cicatrix ∙ creatrix ∙ aviatrix ∙ relatrix zelatrix ∙ senatrix Ornatrix curatrix ∙ novatrix rixatrix Tractrix ∙ genetrix ∙ heretrix ∙ Meretrix debitrix janitrix ∙ genitrix ∙ monitrix heritrix ∙ visitrix paintrix Levotrix adjutrix Ketostix billywix phorminx ∙ quincunx ∙ breadbox ∙ soundbox ∙ saucebox ∙ Smokebox loosebox ∙ horsebox ∙ snuffbox ∙

Words with a ∙ are valid Scrabble words (SOWPODS word list)