Words that contain 'do' and end in 'ex'

There are 4 words that are possible to use from the dictionary for this search.

9 letter words

  • dorsiflex

10 letter words

  • endocortex

11 letter words

  • iridomyrmex

12 letter words

  • pseudocortex

How many letters are in the largest word from this list?
The largest word that's possible to construct from this combination is 'pseudocortex', which has 12 characters.

How many possible words can you make using the combination of letters requested?
There are up to 4 words.