Oracle Keywords

The following words also have a special meaning to Oracle but are not reserved words and so can be redefined. However, some might eventually become reserved words.

ADMIN	CURSOR	FOUND	MOUNT
AFTER	CYCLE	FUNCTION	NEXT
ALLOCATE	DATABASE	GO	NEW
ANALYZE	DATAFILE	GOTO	NOARCHIVELOG
ARCHIVE	DBA	GROUPS	NOCACHE
ARCHIVELOG	DEC	INCLUDING	NOCYCLE
AUTHORIZATION	DECLARE	INDICATOR	NOMAXVALUE
AVG	DISABLE	INITRANS	NOMINVALUE
BACKUP	DISMOUNT	INSTANCE	NONE
BEGIN	DOUBLE	INT	NOORDER
BECOME	DUMP	KEY	NORESETLOGS
BEFORE	EACH	LANGUAGE	NORMAL
BLOCK	ENABLE	LAYER	NOSORT
BODY	END	LINK	NUMERIC
CACHE	ESCAPE	LISTS	OFF
CANCEL	EVENTS	LOGFILE	OLD
CASCADE	EXCEPT	MANAGE	ONLY
CHANGE	EXCEPTIONS	MANUAL	OPEN
CHARACTER	EXEC	MAX	OPTIMAL
CHECKPOINT	EXPLAIN	MAXDATAFILES	OWN
CLOSE	EXECUTE	MAXINSTANCES	PACKAGE
COBOL	EXTENT	MAXLOGFILES	PARALLEL
COMMIT	EXTERNALLY	MAXLOGHISTORY	PCTINCREASE
COMPILE	FETCH	MAXLOGMEMBERS	PCTUSED
CONSTRAINT	FLUSH	MAXTRANS	PLAN
CONSTRAINTS	FREELIST	MAXVALUE	PLI
CONTENTS	FREELISTS	MIN	PRECISION
CONTINUE	FORCE	MINEXTENTS	PRIMARY
CONTROLFILE	FOREIGN	MINVALUE	PRIVATE
COUNT	FORTRAN	MODULE	PROCEDURE

PROFILE	SAVEPOINT	SQLSTATE	TRACING
QUOTA	SCHEMA	STATEMENT_ID	TRANSACTION
READ	SCN	STATISTICS	TRIGGERS
REAL	SECTION	STOP	TRUNCATE
RECOVER	SEGMENT	STORAGE	UNDER
REFERENCES	SEQUENCE	SUM	UNLIMITED
REFERENCING	SHARED	SWITCH	UNTIL
RESETLOGS	SNAPSHOT	SYSTEM	USE
RESTRICTED	SOME	TABLES	USING
REUSE	SORT	TABLESPACE	WHEN
ROLE	SQL	TEMPORARY	WRITE
ROLES	SQLCODE	THREAD	WORK
ROLLBACK	SQLERROR	TIME

Source : https://docs.oracle.com/cd/B10501_01/appdev.920/a42525/apb.htm