Mammoth Uncensored Word List:
28 words ending with ge, 12 letters long

bertillonage chaiselounge counterimage crosslinkage disadvantage disprivilege enterchaunge forecarriage interlinkage intertillage intervillage metalanguage millivoltage mischallenge misknowledge nonknowledge overmortgage paralanguage patrilineage phleborrhage photomontage predischarge preshrinkage reassemblage recentrifuge signlanguage straightedge weathergauge