Short words, long words, fancy words, plain words. There are many different types of words, each with its own value. It's great to use bigger words in your writing, but don't over do it. You can confuse the reader, lose meaning, and sound egoistical. Short word definitely have their place. One of my teachers, Mr. West, once said, ' Don't use a 75 cent word when a five cent word will do.' I can see the beauty in that. Plus no one wants to sound pompous, save that for the character you want everyone to hate. Like Tom in The Great Gatsby... I mean really, who doesn't want to have at least one good swing at him?
Some students make the mistake of using big words they don't really know, to make the teacher think they really tried hard. The problem? They end up using them incorrectly. Which only agitates the teachers and actually has the reverse affect of trying to impress them.
Oh and never miss-use this word: pulchritudinous- physical beauty. Teachers really hate it when you write it mean that something protrudes. Oh and paltry and sultry.... ehhh, yeah. Definitely consult a dictionary before you turn in a paper, because Microsoft won't recognize anything is wrong, because those are words.