The Random House is on CDROM and incredibly handy.
I have a Wordsworth Concise English Dictionary (published in England) that I purchased for a quarter at a booksale that's my favorite traveling dictionary. Small format and print with 1000+ pages.
I used to make fun of Brooke Shields after I heard her say "phenomenons" until I actually looked it up and every dictionary I had listed the word, except Wordsworth.
People used to be taught correct English, both written and spoken. and were made to use dictionaries. Unfortunately, that era seems to have passed.
Words are " magic ", the English language is filled with wonderful words, hardly seen or spoken today,which have been replaced with gibberish and/or slang.
Dictionaries are fun to read. :-)