efts
'What' is a four letter word, 'for' a three letter word, 'which' has five letters, 'yet' is spelled with three while 'it' has only two.
Noel (Christmas) is one holiday with four letters.
addseggsoddsAnnebeefbeenbeepbeerbeetbootbookboomboonbooscoolcootdeerdeepdeeddeemdoordoomfeedfeelfeetfoodfoolfootgoodgeedgoofgoongoopheedheelheedhoodhoofhoophootjeepjeerkeepkeelkeenleekleerloonloomlooplootmeetmoodmoonmoormootneednooknoonpeerpoofpeelpoolpeeppeerroofroomrootreedreelseedseemseenseerseessoonteentooltootwoolweedwoodwoofweep
shoe
Mesa
Plum
lung distance
Some foods spelled with four letters are:beefbeetbrancakecorndatefilofishflanleeklimepitaplumporkriceslawsoupstewtarttuna
hymn
4 letter words, letters 2 and 3 are the same:allybeetbeenbeefbeepbeerbeesboomboonbootcookcoolcoopdeepdeeddeerdoomdoorfeedfeelfeesfeetfoodfoolfootgoodheelhoodhoofhoophootjeepkeepleerloomloonlooplootmeetmoodmoonseedeggsElla
rake
Unna