Here are the 100 English words which many people have problems spelling!

acceptable

accidentally

accommodate

acquire

acquit

a lot

amateur

apparent

argument

atheist

believe

calendar

category

cemetery

changeable

collectible

committed

conscience

conscientious

conscious

definite(ly)

disappear

discipline

drunkenness

embarrass

equipment
 
exhilarate

exceed

existence

experience

fiery

foreign

fourth

gauge

generally

grammar

grateful

guarantee

harass

height

hierarchy

ignorance

immediate

independent

indispensable

intelligence

its / it's

judgement

knowledge

leisure

library

lightning

maintenance

manoeuvre

memento

millennium

miniature

mischievous

noticeable

occasion

occasionally

occur / occurred

occurrence

official

parallel

parliament

pastime

pigeon

possession

preferable

principal / principle

privilege

questionnaire

receive

recommend

referred

reference

relevant

religious

restaurant

ridiculous

rhythm

sandal

schedule

scissors

sensible

separate

special

success

to / too / two

tomorrow

their / they're / there

twelfth

tyranny

until

vacuum

vicious

weather

weird

you're / your