According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 10 words with the pattern -TA---A-. That is, eight letter words with 2nd letter T and 3rd letter A and 7th letter A. In alphabetical order, they are:
atalayas
otalgias
staffman
stairway
stallman
staminal
staminas
standpat
statical
stayaway