Thanks fundybayman - you prodded me out of my apathy. I'll see your 6 and raise you one - BEEFILY and BILLOWY.

Here's the full paragraph:
"AEGILOPS (alternate spelling of egilops, an ulcer in a part of the eye) is apparently the longest word in W2 whose letters are in alphabetical order. This word is not in W3. CHILLLOSS (the opposite of a heatloss) has its letters in alphabetical order, although this word may not be in any dictionary. [Word Ways] The title of the film EFIK MOVY was written abcdEFghIjKlMnOpqrstuVwxYz to show the alphabetical-order property. Mike Turniansky, consulting W3, says BEEFILY and BILLOWY seem to be the only current words of 7 or more letters that have the letters in alphabetic order."

Source: http://home.xnet.com/~eo/word.html