Pat is to tap/ as lap is to pal.

pat 与tap 的关系和lap 与pal的关系一样。

这是英语中的回文现象
就是指能倒过来念的英文单词
类似的词有很多.
例如:
~ A ~

abut tuba
agar raga
agas saga
aider redia
ah ha
ajar raja
am ma
an na
and dna
amaroid diorama
animal lamina
annam manna
are era
ares sera
at ta
ate eta
atlas salta
auks skua
avid diva
~ B ~

bad dab
bag gab
ban nab
bard drab
bat tab
bats stab
bed deb
ben neb
bid dib
big gib
bin nib
bird drib
blub bulb
bog gob
boh hob
bonk knob
bows swob
boy yob
brag garb
bud dub
bulb blub
bun nub
buns snub
bur rub
burg grub
bus sub
but tub
buts stub
~ C ~

cam mac
cares serac
ceps spec
cod doc
cor roc
cos soc
cram marc
cran narc
~ D ~