The anagrams of SPARE are
apers
apres
asper
pares
parse
pears
prase
presa
rapes
reaps
spaer
spare
spear
The anagrams of STARE are
arets
aster
earst
rates
reast
resat
stare
stear
strae
tares
taser
tears
teras
A close second are the words STALE and STALER, each of which can be rearranged into 12 words.
The anagrams of STALE are
least
leats
salet
setal
slate
stale
steal
stela
taels
tales
teals
tesla
The anagrams of STALER are
alerts
alters
artels
estral
laster
ratels
salter
slater
staler
stelar
talers
tarsel
The chart below lists all the most rearrangeable words. Note in particular that the most "rearrangeable bingos" are RETAINS, SEATING, and ANGRIEST. Also note that this information is in regards to the SOWPODS word list only; there is an equivalent list for OWL2.
number letters of words ------- -------- spare 13 stare 13 stale 12 staler 12 staple 11 retains 11 seating 11 angriest 11 steer 10 pales 10 searing 10
SPARE: apers, apres, asper, pares, parse, pears, prase, presa, rapes, reaps, spaer, spare, spear
STARE: arets, aster, earst, rates, reast, resat, stare, stear, strae, tares, taser, tears, teras
STALE: least, leats, salet, setal, slate, stale, steal, stela, taels, tales, teals, tesla
STALER: alerts, alters, artels, estral, laster, ratels, salter, slater, staler, stelar, talers, tarsel
STAPLE: palest, palets, pastel, peltas, petals, plaste, plates, pleats, septal, staple, tepals
RETAINS: anestri, antsier, nastier, ratines, resiant, retains, retinas, retsina, stainer, starnie, stearin
SEATING: easting, eatings, gainest, genista, ingates, ingesta, seating, tagines, tangies, teasing, tsigane
ANGRIEST: angriest, angstier, astringe, ganister, gantries, granites, ingrates, rangiest, reasting, stearing, tasering
STEER: ester, reest, reset, retes, steer, stere, teers, teres, terse, trees
PALES: lapse, leaps, pales, peals, pelas, pleas, salep, sepal, spale, speal
SEARING: angries, earings, erasing, gainers, graines, reagins, regains, reginas, searing, seringa
This list is original research from ScrabbleGuru.com. Come visit us for more!