Lateral thinking is a term coined by Edward de Bono, a Maltese psychologist, physician and writer. It first appeared in the title of his book The Use of Lateral Thinking, published in 1967. De Bono defines lateral thinking as methods of thinking concerned with changing concepts and perception. Lateral thinking is about reasoning that is not immediately obvious and about ideas that may not be obtainable by using only traditional step-by-step logic.
These wordies are known by many different names and can be found all over the web now.
Basically wordies (my phrase) are picture word puzzles usually made up of letters, numbers and words to represent a word phrase or saying. Wordies can be similar to Rebus puzzles in some instances.