RADIX is a term used in mathematics and computing that refers to the BASE or ROOT of a number system. It is typically represented by the number 10, but can also be represented by other numbers such as 2, 8, 16, and 32. BASE is a 4-letter word that is synonymous with RADIX, while ROOT is another 4-letter word that is also synonymous with RADIX. Both words refer to the same concept, which is the BASE or ROOT of a number system.