According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern -EC-DE. That is, six letter words with 2nd letter E and 3rd letter C and 5th letter D and 6th letter E. In alphabetical order, they are:
decade
decide
decode
recede
recode
secede
Six letter words with the second letter 'e' and the letters 'casltd' are:
decals, deltas, desalt
boxtops
Pepper
startle
abdomen abysmal
Exuded or exudes.
bladders
tiptoes
believed, believes, believer, relieved, relieves, reliever, helmeted
facetious, abstemious
geneticsenatorlengthsjanitormonitormonster
Some five letter words with second letter U and fifth letter T are:auditbuiltburntburstcubitduvetguestguiltoughtquartquestquiltquintwurst
badgebargecablecanoecarvedanceeaglefalsegaugehastelargemaizenaivepasterangesaucetablevaluewaste