diff --git a/src/verilog.y b/src/verilog.y
index 147b14539..1a676084a 100644
--- a/src/verilog.y
+++ b/src/verilog.y
@@ -564,13 +564,11 @@ BISONPRE_VERSION(3.7,%define api.header.include {"V3ParseBison.h"})
 %token<fl>              yCHANDLE        "chandle"
 %token<fl>              yCHECKER        "checker"
 %token<fl>              yCLASS          "class"
-//UNSUP %token<fl>      yCLOCK          "clock"
 %token<fl>              yCLOCKING       "clocking"
 %token<fl>              yCMOS           "cmos"
 %token<fl>              yCONSTRAINT     "constraint"
 %token<fl>              yCONST__ETC     "const"
 %token<fl>              yCONST__LEX     "const-in-lex"
-//UNSUP %token<fl>      yCONST__LOCAL   "const-then-local"
 %token<fl>              yCONST__REF     "const-then-ref"
 %token<fl>              yCONTEXT        "context"
 %token<fl>              yCONTINUE       "continue"
@@ -620,9 +618,6 @@ BISONPRE_VERSION(3.7,%define api.header.include {"V3ParseBison.h"})
 %token<fl>              yFORK           "fork"
 %token<fl>              yFORKJOIN       "forkjoin"
 %token<fl>              yFUNCTION       "function"
-//UNSUP %token<fl>      yFUNCTION__ETC  "function"
-//UNSUP %token<fl>      yFUNCTION__LEX  "function-in-lex"
-//UNSUP %token<fl>      yFUNCTION__aPUREV "function-is-pure-virtual"
 %token<fl>              yGENERATE       "generate"
 %token<fl>              yGENVAR         "genvar"
 %token<fl>              yGLOBAL__CLOCKING "global-then-clocking"
@@ -739,9 +734,6 @@ BISONPRE_VERSION(3.7,%define api.header.include {"V3ParseBison.h"})
 %token<fl>              yTABLE          "table"
 //UNSUP %token<fl>      yTAGGED         "tagged"
 %token<fl>              yTASK           "task"
-//UNSUP %token<fl>      yTASK__ETC      "task"
-//UNSUP %token<fl>      yTASK__LEX      "task-in-lex"
-//UNSUP %token<fl>      yTASK__aPUREV   "task-is-pure-virtual"
 %token<fl>              yTHIS           "this"
 %token<fl>              yTHROUGHOUT     "throughout"
 %token<fl>              yTIME           "time"