Because English has so many homophones (words that sound the same, but have different spellings), a common written error is to confuse the spellings.
Some other word pairs have different pronunciations, but are confused nevertheless. Here are some of the most common.
True homophones
capital/capitol
compliment/complement
discreet/discrete
its/it’s
passed/past
principal/principle
stationary/stationery
whose/who’s
Pronounced differently, but confused nevertheless
advice/advise
adverse/averse
affect/effect
between/among
few/less
infer/imply
lie/lay
lose/loose
