"The words Fahrenheit and Celsius are two of the hardest ones for students to spell! Here are some of the many misspellings we've seen in our visitor logs since starting this site:

farenheit, faernheight, fahenheit, fahernheight, fahranheit, fahreheight, fahreheit, fahrehnheit, fahreinheigt, fahreinheit, fahren, fahren heat, fahrenaites, fahreneheit, fahreneit, fahrengheit, fahrenghieght, fahrenhait, fahrenheid, fahrenheiet, fahrenheight, fahrenheite, fahrenheith, fahrenhet, fahrenhiet, fahrenhight, fahrenhite, fahriet, faireheit, fairenheit, fairenheite, fairenthigh, fairheight, fanrenhite, farahein, faranheat, faranhiet, faranhight, fareheint, fareheit, farehnait, fareienheit, fareigheight, fareighheight, fareignheit, fareingheit, fareinheight, fareinheigt, fareinheit, farengheit, farenhaid, farenhaight, farenhait, farenhaith, farenheat, farenheeight, farenheid, farenheidt, farenheight, farenheigt, farenheiht, farenheit, farenheite, farenheith, farenhieght, farenhiet, farenhight, farenhit, farenhute, farenight, farheight, farheneight, farheneit, farhenheit, farhenhiet, farhenit, farhienhiet, farhreheit, farhrenheit, fariegn, farienheight, farienheit, farienhieght, farienhiet, faringhight, farinhaert, farinhart, farinheight, farinhight, farinhit, farneheit, farnehight, farneit, farnheit, farnhiet, farren height, farrenheit, fehernheit, fehrenheit, fehrenhit, fehrenhite, feirenheirt, feirinheight, fenrnhight, fereheith, fereinheit, ferenheight, ferenheit, ferenheith, ferenhight, ferenhite, ferheinight, ferhienight, ferienhiet, ferihite, ferinheight, ferinheit, ferinhet, ferinhiet, ferinhight, ferinhite, fernheit, fernhit, fharenheit, foreignheit, forenghiet, forenhiet, franenheit, and frenihieght

celceous, celcious, celcius, cellcious, cellcius, cellsius, sellcius and selsius"