2,580 using Webster's Second International. Using a much smaller dictionary, and a minimum word length of seven letters narrows it down to 83:
acclaim
albumen
albumin
alembic
almanac
alumina
alumnae
ambiance
ambulance
amiable
amicable
angelic
angelica
aphelia
bacchanal
backache
backing
balance
big-name
biplane
blacken
blacking
blue-chip
bumpkin
calamine
calcine
calcium
cambial
campaign
campanile
camping
capable
caulking
cephalic
chalice
champagne
chancel
chapeau
chaplain
check-in
checkup
chemical
chicken
chickpea
chipmunk
chuckle
clambake
cleanup
cubical
cubicle
cupcake
galumph
hacking
haulage
heaping
heckling
helping
hulking
humbling
humpback
imbalance
impanel
impeach
incapable
lacking
lacunae
lambkin
laminae
linkage
machine
magical
mailbag
manacle
maniacal
manlike
mechanic
mechanical
mucilage
package
packing
panacea
panache
pancake
pelagic
pelican
plumage
publican
unalike
buckingham
No words can be spelled using all of the letters. Some words using some of the letters are:HoldupUpholdProudDropHoldHourLordPlodPourProdDuoDuhHopOldOurPodProRod
Words that can be made from the letters in "thing" are:ginhihinthitIinitnighnightnitthintin
No words can be made using all of the letters. Some words using some of the letters are:RodentDetoxDroneGonerNotedTonedTonerTrendDentDoneDoteGentGoneNerdNextNodeNoteOxenRentRodeTendTongToreTornTrodDenDoeDogDotEgoEndGetGotNetNodNotOdeOneOreRexRodTenTon
Words that can be spelled using letters from "marmalade" are:AlarmedArmadaMadameMeddlerRammedAlarmArmedDreamMedalRealmAreaDealDearDramLameLardLearMadeMareMealReadRealArmEarElmLadMadMedRamRed
Some words formed using the letters LLEDNCE:CedeCeeCelledCelCellDeDeeDeleDelDellDeneDenEdEelElEldEllEndEnLedLedeLeeLendNeedNeNee
No words can be spelled using all of the letters 'suaave'.Some words that can be spelled using some of the letters are:SuaveSaveVaseAveSeaUseUs
No words can be made using all of the letters of 'Sophie'.Some words that can be made using some of the letters are:HopesPoiseHipsHopeHopsPiesPosePoshShipShoeShopHipHisHopPieSheSip
Somebody built a huge palace in my back yard yesterday!
Some words that can be formed using the letters payroll:AllAlloyAlpAllyLapLayLopLoryLoyalOarOpalOralOrallyPalPallPallorPallyParPayrollPayPlayPloyPlyPolarPolPollPrayProPryRallyRapRayRollRopyRoyalRyaYapYar
Words that can be made using the letters from 'Happy Halloween' are:aallallowananyapeappallappearappleawleelellendendowewehahalehallhandhandyhappenhayhealheapheelhellohellhelphewhoeholehophopehowlalanelaplawleanloanlownapnapeneonnewnonowpalpalepanpanepawpawnpeelpenpeoplepewplaneplowwon
There are no English words you can make using only those letters.