According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 88 words with the pattern -O-A-E-. That is, seven letter words with 2nd letter O and 4th letter A and 6th letter E. In alphabetical order, they are:
bocages
bolases
boraces
borages
boranes
borated
borates
boraxes
bovates
comaker
comakes
comates
cowages
dogates
donated
donates
dosages
dotages
douanes
dowager
folates
foraged
forager
forages
foramen
forayed
forayer
gowaned
homaged
homager
homages
iodated
iodates
kokanee
lobated
locales
located
locater
locates
lovages
loyaler
monades
monases
mopanes
morales
nocakes
nodated
nomades
nonaged
nonages
nonanes
nopales
notated
notates
novated
noyades
pomaces
pomaded
pomades
potager
potages
romages
rosacea
rosaces
rosaker
rotated
rotates
royalet
socager
socages
sofabed
solaced
solacer
solaces
solated
solates
sorages
togated
tolanes
topazes
totaled
towages
voyaged
voyager
voyages
womaned
zonated
zouaves
ferest
HandsomeRhapsodyIllusoryLiaisonsCreosoteScissorsMany more. . .
tincture, puncture, punctual, confound
parables
Alphabet
No answer yet, but it probably ends with "ing"
8 letter words with 6th letter a: * allocate * blizzard * breakage * blockage * cribbage * contrast * coverage * cleavage * contract * constant * cupboard * carriage * cocktail * complain * constant * drainage * drunkard * dedicate * estimate * elongate * fountain * fumigate * fragrant * graduate * generate * halfback * hesitant * heritage * irritant * incubate * mountain * medicate * poundage * roughage * reengage * sewerage * suffrage * stoppage * stockade * tutelage * truncate
resistor
briefing
variance
External Exciting
stockade