dropout, fencesitter, independent, loner, mugwump, naturist, nightbird, nighthawk, nudist, withdrawer.
Your query has returned 331 words, which include anagrams of individualist as well as other shorter words that can be made using the letters included in individualist.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.