The (polite) Four Letter Word Game

haul

hila

http://dictionary.reference.com/browse/hila?s=ts

lain

anil

anal

(well, somebody had to… )

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As the WinXP user in the crowd, that probably should have been me.

.

ulna

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faun

(my turn again???)

anus

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snub

buns

buss

www.micmap.org/dicfro/search/century-dictionary/buss

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fuss

suss

subs

sobs

stob

bast

best

bust

stub