#entry = 141891
#palindrome + #inversible= 381
#palindrome = 112
AA
AAA
AMA
BB
BBB
CBC
CDC
CFC
DD
DMD
DOD
ENE
EOE
ESE
HRH
KKK
LL
MGM
MM
PCP
PDP
PP
RR
RSFSR
SCCS
SOS
SS
SSS
TNT
WNW
WSW
WW
WWW
aha
aka
ala
bib
bob
boob
bub
cc
civic
dad
dd
deed
deified
dewed
did
dud
eke
ere
eve
ewe
eye
ff
gag
gig
huh
ii
iii
kayak
kook
level
ll
ma'am
madam
minim
mm
mom
mum
non
noon
nun
oho
pap
peep
pep
pip
poop
pop
pp
pup
radar
redder
refer
repaper
reviver
rotator
rotor
s's
sagas
sees
seres
sexes
shahs
sis
solos
sos
stats
stets
sys
tat
tenet
tit
toot
tot
tut
usu
wow
xix
xx
xxx
#inversible = 269
AB <-> BA
ABM <-> MBA
ABS <-> SBA
AC <-> CA
AD <-> DA
AI <-> IA
AL <-> LA
AM <-> MA
AP <-> PA
ATP <-> PTA
AV <-> VA
BC <-> CB
BM <-> MB
BO <-> OB
CAP <-> PAC
CD <-> DC
CPU <-> UPC
DDT <-> TDD
DI <-> ID
DJ <-> JD
DP <-> PD
DUI <-> IUD
EM <-> ME
GP <-> PG
IV <-> VI
JV <-> VJ
KO <-> OK
KS <-> SK
MN <-> NM
MP <-> PM
MT <-> TM
NT <-> TN
OS <-> SO
PR <-> RP
PW <-> WP
TV <-> VT
abut <-> tuba
ac <-> ca
agar <-> raga
ah <-> ha
am <-> ma
animal <-> lamina
are <-> era
ate <-> eta
auks <-> skua
avid <-> diva
bad <-> dab
bag <-> gab
ban <-> nab
bard <-> drab
bat <-> tab
bats <-> stab
bed <-> deb
bin <-> nib
bird <-> drib
bl <-> lb
bog <-> gob
brag <-> garb
bro <-> orb
bud <-> dub
bun <-> nub
buns <-> snub
bur <-> rub
burg <-> grub
bus <-> sub
but <-> tub
buts <-> stub
cal <-> lac
cam <-> mac
cit <-> tic
ck <-> kc
cod <-> doc
cos <-> soc
dam <-> mad
debut <-> tubed
decaf <-> faced
decal <-> laced
deem <-> meed
deep <-> peed
deeps <-> speed
deer <-> reed
def <-> fed
deffer <-> reffed
deliver <-> reviled
demit <-> timed
denier <-> reined
denies <-> seined
denim <-> mined
depot <-> toped
dessert <-> tressed
desserts <-> stressed
deus <-> sued
devil <-> lived
dew <-> wed
dial <-> laid
diam <-> maid
diaper <-> repaid
dim <-> mid
dog <-> god
don <-> nod
doom <-> mood
door <-> rood
dos <-> sod
draw <-> ward
drawer <-> reward
draws <-> sward
dray <-> yard
dual <-> laud
edit <-> tide
eel <-> lee
eh <-> he
em <-> me
emir <-> rime
emit <-> time
ergo <-> ogre
etas <-> sate
evil <-> live
eviler <-> relive
fer <-> ref
fires <-> serif
flog <-> golf
flow <-> wolf
gal <-> lag
gals <-> slag
gar <-> rag
gas <-> sag
gel <-> leg
gem <-> meg
gen <-> neg
giro <-> orig
girt <-> trig
gm <-> mg
gnat <-> tang
gnus <-> sung
got <-> tog
gulp <-> plug
gulper <-> replug
gum <-> mug
gums <-> smug
guns <-> snug
gut <-> tug
ho <-> oh
hoop <-> pooh
ht <-> th
it <-> ti
iv <-> vi
ix <-> xi
jar <-> raj
kcal <-> lack
keel <-> leek
keels <-> sleek
keep <-> peek
knits <-> stink
knot <-> tonk
know <-> wonk
kw <-> wk
lager <-> regal
lair <-> rial
lap <-> pal
leer <-> reel
leper <-> repel
let <-> tel
lever <-> revel
liar <-> rail
loop <-> pool
loops <-> spool
loot <-> tool
looter <-> retool
loots <-> stool
lop <-> pol
macs <-> scam
maps <-> spam
mar <-> ram
mart <-> tram
mat <-> tam
maws <-> swam
may <-> yam
meet <-> teem
mer <-> rem
mets <-> stem
mils <-> slim
mo <-> om
moor <-> room
mot <-> tom
mp <-> pm
mu <-> um
mus <-> sum
nap <-> pan
naps <-> span
net <-> ten
new <-> wen
nip <-> pin
nips <-> spin
nit <-> tin
no <-> on
nos <-> son
not <-> ton
now <-> won
nus <-> sun
nut <-> tun
nuts <-> stun
oat <-> tao
oder <-> redo
oner <-> reno
pacer <-> recap
pals <-> slap
pans <-> snap
par <-> rap
part <-> trap
parts <-> strap
pas <-> sap
pat <-> tap
paws <-> swap
pay <-> yap
peels <-> sleep
pees <-> seep
per <-> rep
perts <-> strep
pets <-> step
pins <-> snip
pis <-> sip
pit <-> tip
pols <-> slop
pools <-> sloop
ports <-> strop
pot <-> top
pots <-> stop
pow <-> wop
pus <-> sup
raps <-> spar
rat <-> tar
rats <-> star
raw <-> war
rebut <-> tuber
recaps <-> spacer
redraw <-> warder
reknit <-> tinker
remit <-> timer
retros <-> sorter
rot <-> tor
rt <-> tr
saps <-> spas
saw <-> was
six <-> xis
sleets <-> steels
sloops <-> spools
smart <-> trams
snaps <-> spans
snips <-> spins
snit <-> tins
snoops <-> spoons
snort <-> trons
snot <-> tons
spat <-> taps
spay <-> yaps
spit <-> tips
sports <-> strops
spot <-> tops
spots <-> stops
sprat <-> tarps
st <-> ts
stat <-> tats
stew <-> wets
straw <-> warts
sway <-> yaws
tort <-> trot
tow <-> wot
trow <-> wort
way <-> yaw