four - letter word

1-chloro-4-(trichloro-methyl)benzene benthohyponeuston Bizonia calcium ferrrocyanide core texture current effective value distributing slide valve heat supply pipeline Hueppe's disease imperverse multi-valley superconductor nelson mandelas nonlinear congruential method poetic imagination provisional denture restitutive law second-order leveling warping beam well-rooted zoogeographical zone