Take a look at these two sentences – one of them contains a mistake:
– I poured over book after book.
– We pored over the catalogues.
Are you uncertain which one is right?
There are a lot of words in English that look or sound alike but have very different meanings, such as pore and pour or flaunt and flout.
Watch this video by Oxford Dictionaries:
Read more about commonly confused words in English HERE (via Oxford Dictionaries – Language matters)