engeneering engineering error-prone ferroniere ferronnerie ferronniere fire-engine friponnerie froenningen geoengineer goinggreene greenfinger greenpepper groenningen ingenioeren irong-irong ngiri-ngiri nine-o-nine nonengineer norpregnene one-for-one piergiorgio pip-pip-pip pipe-opener pirenperone poggioferro pre-popping preneopogon proof-proof re-engineer region-free reigning-in reignoffire rereferring ring-finger rongo-rongo