Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'pool', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
pool
Transposition0
opol
polo
Transposition1
oopl
ploo
Transposition2
loop
Transposition2r
loop
Transposition0x2
oplo
Slip3A
oopl
polo
Slip3B
opol
ploo
Omission
ool
pol
poo
Repetition
ppool
poool
pooll
QWERTY Substitution
oool
piol
ppol
poil
popl
pook
QWERTY Repetition after
poool
poiol
popol
pooil
poopl
poolk
QWERTY Repetition before
opool
piool
ppool
poiol
popol
pookl
QWERTY Substitution Transposed
oolo
ipol
poil
pilo
popl
pplo
opil
piol
poli
oppl
ppol
polp
opok
poko
WrongDoubles
ppol
poll
$JSON
$address
$applyDefault
$clone
$commas
$copy
$copyFields
$delete
$entries
$expand
$filt
$getType
$isArray
$isBoolean
$isClass
$isDate
$isElement
$isFunction
$isNumber
$isObject
$isString
$isType
$isValidDate
$json2txt
$keys
$load
$matchall
$parseFloats
$pick
$postJSON
$prune
$save
$set
$sortBy
$sortKeys
$stringify
$stringifySafe
$sum
$svgPoster1
$table
$textify
$toFixed
$type
$without
Glossary
Transposition = adjacent pairs of letters are swapped
Omission = individual letters are missed out
Repetition = individual letters are entered twice consecutively
QWERTY substitution = letters are replaced by each of their QWERTY-keyboard based physical neighbours (e.g. 'h' gets replaced with y, u, j, n, b, g)
QWERTY repetition type 1 = letters are followed by each of their QWERTY-keyboard neighbours
QWERTY repetition type 2 = letters are preceded by each of their QWERTY-keyboard neighbours