Related by context. Frequent words. (Click for all words.) 28 functional 24 regulated 24 defined 23 function 23 operate 22 consists 21 built 21 created 21 established 20 installed 20 functioning 20 functions 20 exist 19 operated 19 existed 18 regulate 17 exists 17 equipped 17 formed 17 evolved 17 applied 17 constructed 17 developed 16 used 16 composed 16 structured 15 housed 15 utilized 15 works 15 implemented 13 operates 13 suited 12 existence 12 controlled 12 lit 12 communicate 11 transformed 11 mounted 11 opened 11 administered 10 smoothly 10 known 10 demonstrated 10 serve 9 ran 9 serves 8 managed 8 assumed 8 occupied 8 documented 7 observed 7 looked 7 performs 7 worked 7 assembled 6 maintained 6 practiced 6 handles 6 studied 6 emerged 6 acted 5 lacked 5 pitched 5 referred 5 performed 5 arranged 5 employed 3 organized 3 understood 2 sounded 2 sat 2 lasted 2 relied 1 went 1 regarded 1 served 1 described 1 remained 1 acting 0 competed 0 been 0 stood 0 gone 0 portrayed 0 succeeded 0 done 0 belonged 0 participated 0 conducted 0 serving -1 appointed -2 handled -3 was -3 had -3 rode -3 happened -4 felt -4 played -5 lived -5 stayed -11 attended