10 letter words:
behappened20,
8 letter words:
behappen17,
happened16,
6 letter words:
happed14,
ephebe13,
happen13,
behead12,
daphne12,
heaped12,
append11,
bedpan11,
beenah11,
beeped11,
napped11,
peahen11,
peeped11,
beaned9,
bendee9,
deepen9,
neaped9,
peaned9,
peened9,
5 letter words:
bandh11,
heben10,
phene10,
nappe9,
peepe9,
baned8,
naped8,
paned8,
pened8,
eaned6,
4 letter words:
epha9,
heap9,
hebe9,
ahed8,
beep8,
ehed8,
hade8,
haed8,
hand8,
head8,
heed8,
hend8,
pape8,
peba8,
peep8,
abed7,
aped7,
bade7,
band7,
bead7,
bede7,
bend7,
debe7,
deep7,
haen7,
pand7,
peed7,
pend7,
bane6,
bean6,
been6,
bene6,
epee6,
nabe6,
nape6,
neap6,
neep6,
pane6,
pean6,
peen6,
pene6,
dean5,
deen5,
dene5,
need5,
3 letter words:
bah8,
hap8,
hep8,
pah8,
peh8,
app7,
bap7,
dah7,
edh7,
had7,
pap7,
pep7,
bad6,
bed6,
dab6,
dap6,
deb6,
hae6,
han6,
hen6,
nah6,
pad6,
ped6,
ape5,
ban5,
bee5,
ben5,
nab5,
nap5,
neb5,
nep5,
pan5,
pea5,
pee5,
pen5,
and4,
dae4,
dan4,
dee4,
den4,
end4,
ned4,
ane3,
ean3,
een3,
ene3,
nae3,
nee3,
2 letter words:
ah5,
eh5,
ha5,
he5,
ab4,
ba4,
be4,
pa4,
pe4,
ad3,
da3,
de3,
ed3,
ae2,
an2,
ea2,
ee2,
en2,
na2,
ne2,