Mammoth Uncensored Word List:
24 words ending with il, 10 letters long

bibliophil breastrail chromophil cinquefoil cottontail disembroil disentrail eosinophil fingernail francophil heterophil neutrophil ploughtail psammophil quatrefoil silvertail springtail squaresail thermophil thiouracil ultracivil untranquil whereuntil yellowtail