Yes, SYSTEM is a Scrabble word!

noun

1. instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity
2. a group of independent but interrelated elements comprising a unified whole
3. (physical chemistry) a sample of matter in which substances in different phases are in equilibrium
4. a complex of methods or rules governing behavior
5. an organized structure for arranging or classifying
6. a group of physiologically or anatomically related organs or parts
7. a procedure or process for obtaining an objective
8. the living body considered as made up of interdependent components forming a unified whole
9. an ordered manner; orderliness by virtue of being methodical and well organized