agrarian, authoritarian, barbarian, bavarian, bulgarian, carrion, centenarian, clarion, contrarian, disciplinarian, egalitarian, humanitarian, humanitarian, hungarian, marian, nonsectarian, octogenarian, parliamentarian, proletarian, sectarian.
Your query has returned 92 words, which include anagrams of planarian as well as other shorter words that can be made using the letters included in planarian.
The words in this list can be used in games such as Scrabble, Words with Friends and other similar games.