Slippery surfaces can be caused by a variety of materials, including ICE and teflon. ICE is a three letter word and teflon is a six letter word, both of which are solutions to the crossword term 'slippery surface'. ICE is a naturally occurring solid form of water that is slippery when walked on, while teflon is a synthetic material that is often used to create non-stick surfaces and is also slippery when walked on.