I read the problem as replacing one or more e's, not all e's.

That gets these additions:

becker -> bicker
complement -> compliment
complementary -> complimentary
empress -> impress
endorse -> indorse
enfield -> infield
enquire -> inquire
enviable -> inviable
freedman -> friedman
freeze -> frieze
kenney -> kinney
kettle -> kittle
meddle -> middle
peddle -> piddle
redden -> ridden
semper -> simper
whether -> whither

[download]
FWIW, my first pass at this was 
perl -E'chomp(my @w=grep /[ie]/ && length > 5, readline); for my $w (r
+everse @w) { say "$w ->  $_" for grep defined, @w{glob $w =~ s/e/{e,i
+}/r}; $w{$w}=$w }' unixdict.txt

[download]

In reply to Re: Perl at Rosetta Code, with one particular example by ysth
in thread Perl at Rosetta Code, with one particular example by Anonymous Monk

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