Here's the full list of reserved keywords broken up by color:
Operators (Grey)
ALL, AND, ANY, BETWEEN, CROSS, EXISTS, IN, INNER, IS, JOIN, LEFT, LIKE, NOT, NULL, OR, OUTER, PIVOT, RIGHT, SOME, UNPIVOT
System Functions (Magenta)
COALESCE, COLLATE, CONTAINS, CONVERT, CURRENT_TIME, CURRENT_TIMESTAMP, CURRENT_USER, NULLIF, SESSION_USER, SYSTEM_USER, TSEQUAL, UPDATE
Keywords (Blue)
ADD, ALTER, AS, ASC, AUTHORIZATION, BACKUP, BEGIN, BREAK, BROWSE, BULK, BY, CASCADE, CASE, CHECK, CHECKPOINT, CLOSE, CLUSTERED, COLUMN, COMMIT, COMPUTE, CONSTRAINT, CONTAINSTABLE, CONTINUE, CREATE, CURRENT, CURRENT_DATE, CURSOR, DATABASE, DBCC, DEALLOCATE, DECLARE, DEFAULT, DELETE, DENY, DESC, DISK, DISTINCT, DISTRIBUTED, DOUBLE, DROP, DUMP, ELSE, END, ERRLVL, ESCAPE, EXCEPT, EXEC, EXECUTE, EXIT, EXTERNAL, FETCH, FILE, FILLFACTOR, FOR, FOREIGN, FREETEXT, FREETEXTTABLE, FROM, FULL, FUNCTION, GOTO, GRANT, GROUP, HAVING, HOLDLOCK, IDENTITY, IDENTITYCOL, IDENTITY_INSERT, IF, INDEX, INSERT, INTERSECT, INTO, KEY, KILL, LINENO, LOAD, MERGE, NATIONAL, NOCHECK, NONCLUSTERED, OF, OFF, OFFSETS, ON, OPEN, OPENDATASOURCE, OPENQUERY, OPENROWSET, OPENXML, OPTION, ORDER, OVER, PERCENT, PLAN, PRECISION, PRIMARY, PRINT, PROC, PROCEDURE, PUBLIC, RAISERROR, READ, READTEXT, RECONFIGURE, REFERENCES, REPLICATION, RESTORE, RESTRICT, RETURN, REVERT, REVOKE, ROLLBACK, ROWCOUNT, ROWGUIDCOL, RULE, SAVE, SCHEMA, SECURITYAUDIT, SELECT, SET, SETUSER, SHUTDOWN, STATISTICS, TABLE, TABLESAMPLE, TEXTSIZE, THEN, TO, TOP, TRAN, TRANSACTION, TRIGGER, TRUNCATE, UNION, UNIQUE, UPDATETEXT, USE, USER, VALUES, VARYING, VIEW, WAITFOR, WHEN, WHERE, WHILE, WITH, WRITETEXT