13196
Plenty of kanji are symmetrical on the y-axis and x-axis. Plenty of kanji are
symmetrical only on the y-axis.

What are some kanji that are only symmetrical on the x-axis? I don't know one.

What kanji change into another kanji when they are rotated and/or flipped?
Here is one that I know:  
干 -- flip --> 士
CC BY-SA 3.0
2013-10-19T01:41:03.347
13195
2013-10-19T02:26:32.310
3962
question
kanji
what are kanji that can be flipped, but not rotated?
Here's two that have just horizontal symmetry, at least in some fonts: 旧 咺
CC BY-SA 3.0
2013-10-19T01:58:25.070
13196
2013-10-19T01:58:25.070
3295
13195
answer
巨 臣 排 区 州 唱, etc. but this is for fun only. Some are not as symetrical as
others.
CC BY-SA 3.0
2013-10-19T02:26:32.310
13197
2013-10-19T02:26:32.310
13195
answer