The wonderful thing about a good dictionary is that it not only lets you know how to spell words, it also - and here is a secret which some of you might not know - tells you what the words mean as well.
What is more fun is to find an OLD dictionary. If old enough ( and that need not be that far away temporally [is that a real word, or did I invent it? I must look it up some time!] ) you can find some wonderful words, and obsolete definitions for current words which have been hijacked.
Open a page at random and take a word. If you do not understand the definition, use a dictionary to look up the meaning of the words in the definition - you may be surprised! You can go on for hours if you start with the wrong word!
When I used to edit a beer magazine I used a spell checker regularly. It used to throw out dozens of correctly spelt words, so I spent more time checking in a dictionary that my spellings were correct - 99% of them were! Where it did come in handy was checking beer and brewery names, also local place names. I entered them as a custom dictionary and used it to check for typographic errors (or should that be typing mistakes?) before printing out the pages.
Conclusion - spel cheekers hav a plaice, but do not trust them or buy a used car from them.
Quaque!
Gerroff the Duck!!!!!