h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

The only example I can think of is "oxo". It's the same backwards, and it also works as a palindrome in a upward direction.

We need a tet-a-tet.

BOB

When all in capitals you can put a mirror horizontally through the middle.

<BB<

"Symmetrical palindrome" maybe ?

That's interesting.

OHO!

SOS

How about:

X - it marks the spot and is 10
XX - Two kisses
XXX - Extra-strong mints
XXXX - Extra-strong Beer

<BB<

Honorable mention:

WOW upside down is MOM. Both are palindromes, though not the same palindrome.

XIX - 19

<BB<

SIS

if you flip a "S" upside down you get a "Z" (zed) even if it does have curvy corners'.



F S

NOON

"if you flip a "S" upside down you get a "Z" (zed) even if it does have curvy corners'."

Not when I do it. It's an S either way.

The only way I can think of to create a 2-way palindrome is to pivot the letters on an horizontal plane. This is obvious by the example in post #8.

In a normal palindrome we reverse the order of the letters, not the font itself, as most are a single line this would be meaningless unless you flip the font

F S

What you're describing sounds a bit like an ambigram.

>>erm if you flip a "S" upside down you get a "Z" (zed) even if it does have curvy corners'.

sorry

<<

Ah, but it has an axis of rotational symmetry going through the centre of I

So SIS is still symmetric, just in a different way

Same with NOON


EXE (as in the river) works

If I write the alphabet (all in capitals) the following letters are the same upside-down as the "right" way up.

HINOSXZ -

so any palindrome with those letters in it will fit the bill. (Not many!)

Bluebottle's method with the mirror in post 3 gives a few more letters, but excludes many others - such as N, S and Z.