The term SHOELACE SUBSTITUTE can be solved with the 6-letter word VELCRO. Velcro is a type of fastener that consists of two strips of fabric, one with tiny hooks and the other with small loops. It was invented in 1941 by Swiss engineer George de Mestral, who noticed how burrs stuck to his clothing and his dog's fur. Velcro has since become a popular alternative to shoelaces, as it is much easier to use and does not require tying or untying.