11 letter words
SCEUOPHYLAX​28
SPECULATRIX​22
10 letter words (6 words)
SEPARATRIX​19
SPECTATRIX​21
SPORTSPLEX​21
SQUEEZEBOX​37
SUBBUREAUX​21
SUPERHELIX​22
9 letter words (7 words)
SUBMATRIX​20
SHADOWBOX​25
STRONGBOX​19
SPONDULIX​19
SUBCLIMAX​22
SUBCORTEX​20
SUPERFLUX​21
8 letter words (16 words)
SMALLPOX​19
SUPERMAX​19
SPINIFEX​20
SUBINDEX​18
SARDONYX​19
SAUCEBOX​19
SCRUMPOX​21
SMOKEBOX​23
SNEAKBOX​21
SNUFFBOX​23
SOUNDBOX​18
SUPERFIX​20
SUPERSEX​17
SUPERTAX​17
SWEATBOX​20
SWINEPOX​20
7 letter words (11 words)
SANDBOX​17
SIMPLEX​18
SPANDEX​17
SOAPBOX​18
SHOEBOX​19
SHOWBOX​22
SALTBOX​16
SALPINX​16
SEALWAX​17
SEEDBOX​17
SONOVOX​17
6 letter words (15 words)
SYNTAX​16
SUFFIX​19
SPHINX​18
SKYBOX​22
SUPLEX​15
SPHYNX​21
SURTAX​13
SMILAX​15
SYRINX​16
STYRAX​16
SPADIX​16
SCOLEX​15
SILVEX​16
STORAX​13
SUBFIX​18
5 letter words
SILEX​12
SALIX​12
SOREX​12
3 letter words (4 words)
SEX​10
SIX​10
SOX​10
SAX​10