y: (68) 
y (min=7): (1) rhythms
e: (655) 
e (min=9): (1) strengths
u: (684) 
u (min=8): (1) schmucks
o: (847) 
o (min=8): (2) borschts, schlocks
a: (1172) 
a (min=8): (2) schmaltz, schnapps
i: (991) 
i (min=9): (1) tsktsking
uu: (143) 
uu (min=10): (2) dumbstruck, thrustpush
oo: (680) 
oo (min=11): (1) strongholds
yy: (12) dryly, flyby, flybys, gypsy, pygmy, shyly, slyly, spryly, stymy, sylphy, thymy, wryly
aa: (825) 
aa (min=11): (3) crankshafts, grandstands, transplants
ii: (966) 
ii (min=11): (8) birthrights, childbirths, millwrights, nightshirts, shinsplints, shipwrights, sprinklings, stillbirths
ee: (1602) 
ee (min=11): (1) strengthens
eee: (1005) 
eee (min=13): (4) entrenchments, restrengthens, retrenchments, strengtheners
aaa: (172) 
aaa (min=11): (2) attractants, canvasbacks
iii: (102) 
iii (min=12): (1) highlighting
ooo: (158) 
ooo (min=11): (3) chloroforms, promptbooks, strongrooms
yyy: (1) syzygy
uuu: (11) cumulus, jujutsu, jujutsus, succubus, susurrus, tumultus, tumulus, untrustful, untruthful, usufruct, usufructs
iiii: (18) 
iiii (min=12): (2) disciplining, disinclining
oooo: (34) 
oooo (min=11): (4) cottonwoods, nonorthodox, schoolbooks, schoolrooms
eeee: (172) 
eeee (min=14): (3) relentlessness, restrengthened, speechlessness
aaaa: (15) 
aaaa (min=10): (5) casablanca, catamarans, jacarandas, madagascar, maharajahs
uuuu: (2) muumuu, muumuus
aaaaa: (1) abracadabra
eeeee: (9) beekeeper, beekeepers, defenselessness, effervescence, enfeeblement, enfeeblements, freewheelers, reemergence, representee
iiiii: (1) libidinizing