The most common known are probably facetious (meaning sarcastic), abstemious (meaning sparing or moderate), arterious (pertaining to artery) and annelidous (pertaining to annelid, which is a segmented worm). There's also anemious, adventitous, abstentious, acheilous, acherious, acleistous, affectious, aerious, arsenious, bacterious, caesious, caespitosum, caespitosus, fracedinous, gareisoun, gravedinous, majestious, materious, parecious, placentious, tragedious, and vaceious. Certain medical dictionaries would also yield the even more obscure arsenicosum, arteriosum, arteriosus, and catechicorum. For variation, the words unoriental, subcontinental, uncomplimentary, unnoticeably and quodliteral all contain each vowel in reverse order