Here are some possible words:
acct
aced
aces
ache
achy
acid
acme
acne
acre
acts
eccl
echo
ecol
econ
ecru
ecus
iced
ices
icky
icon
rcpt
scab
scad
scag
scam
scan
scar
scat
scow
scud
scum
scut
Some 4 letter Christmas words are:treegiftbellwishloveshopsnowsale
4
nailnestnapenamenecknewsnerdnewtneonnextneatnearneednicenicknopenounnooknoonnormnosenodenoshnotenullnumbnuts
Iraq.
KkING
Some four letter words with a second letter U are:auraburncurbcuredulldumbeurofundguruhugejumpjunklumpluremuchmutenudeoustpullpurepushrulerumpruinruserushrustsuchsurftune
spotspamspinspit_______________5 letter words:spellsportspeedspoonspacespill
buttcutecutsgutshutsjutejutsmutemuttnutsputsruts
onus, opus, foul
Baby, Many, Hazy, Zany...uhm thats all i can think of
"WACA " Name of cricket ground in Australia
Chic Ohio
4 letter words, letters 2 and 3 are the same:allybeetbeenbeefbeepbeerbeesboomboonbootcookcoolcoopdeepdeeddeerdoomdoorfeedfeelfeesfeetfoodfoolfootgoodheelhoodhoofhoophootjeepkeepleerloomloonlooplootmeetmoodmoonseedeggsElla
lost post cost host most
133 words
Buss (As in BUSS compression) Cuss Fuss
abbeabedacedbabebadebeadbeefcafecaffcecacededacedeaddeafdeedfacefadefafffeeddecade