Some seven letter words with the second letter A and the third letter U are:
agelessagonizeegotistignitesigneous
7 letter word 3rd letter x
possess
Animals
economy
shifted
transom
Amassed
cabinetcaboosedebtorsrebuiltonboardmobsterreboundsubsidywebsitetabletssubwayslobsterreboundrebateslibraryrabbitsdebrieffibbingembraceembargolabeledorbitedrebirth
Behoove.
garbage
ardvark
Requiem?
agelessagonizeegotistignitesigneous
7 letter word 3rd letter x
7 letter word 3rd letter x
Oedipal