3 letters

dex ∙

5 letters

codex ∙ judex iudex fedex ∙ Medex Lidex index ∙ podex ∙

6 letters

Cordex Mondex Windex vindex Amodex muldex Anidex Caudex ∙ Efudex

7 letters

Semodex Demodex Noindex Tomudex reindex ∙ deindex ∙ spandex ∙ Humidex ∙ Zoladex

8 letters

Faslodex subindex ∙ Arimidex Nolvadex Sephadex

9 letters

autoindex

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