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25 words ending with nt, 15 letters long

acknowledgement antidevelopment counterargument counterirritant countermovement disentanglement disillusionment eclaircissement enfranchisement hyperexcitement immunocompetent immunodeficient micromanagement overachievement overdevelopment overextravagant reapportionment reestablishment semitranslucent semitransparent superconvenient supergovernment ultraconvenient underemployment underinvestment