Probably the best way is to simply pull that HTML table from the snowflake documentation and create your own list. Excel is one method. You can "Insert data from Web", then use TEXTJOIN() on the range to create a list of the keywords. This gets me this list that you can use in a regex
((ACCOUNT)|(ALL)|(ALTER)|(AND)|(ANY)|(AS)|(BETWEEN)|(BY)|(CASE)|(CAST)|(CHECK)|(COLUMN)|(CONNECT)|(CONNECTION)|(CONSTRAINT)|(CREATE)|(CROSS)|(CURRENT)|(CURRENT_DATE)|(CURRENT_TIME)|(CURRENT_TIMESTAMP)|(CURRENT_USER)|(DATABASE)|(DELETE)|(DISTINCT)|(DROP)|(ELSE)|(EXISTS)|(FALSE)|(FOLLOWING)|(FOR)|(FROM)|(FULL)|(GRANT)|(GROUP)|(GSCLUSTER)|(HAVING)|(ILIKE)|(IN)|(INCREMENT)|(INNER)|(INSERT)|(INTERSECT)|(INTO)|(IS)|(ISSUE)|(JOIN)|(LATERAL)|(LEFT)|(LIKE)|(LOCALTIME)|(LOCALTIMESTAMP)|(MINUS)|(NATURAL)|(NOT)|(NULL)|(OF)|(ON)|(OR)|(ORDER)|(ORGANIZATION)|(QUALIFY)|(REGEXP)|(REVOKE)|(RIGHT)|(RLIKE)|(ROW)|(ROWS)|(SAMPLE)|(SCHEMA)|(SELECT)|(SET)|(SOME)|(START)|(TABLE)|(TABLESAMPLE)|(THEN)|(TO)|(TRIGGER)|(TRUE)|(TRY_CAST)|(UNION)|(UNIQUE)|(UPDATE)|(USING)|(VALUES)|(VIEW)|(WHEN)|(WHENEVER)|(WHERE)|(WITH))
or in SQL
SELECT * FROM (VALUES
('ACCOUNT')
,('ALL')
,('AND')
,('ANY')
,('AS')
,('BETWEEN')
,('BY')
,('CASE')
,('CAST')
,('CHECK')
,('COLUMN')
,('CONNECT')
,('CONNECTION')
,('CROSS')
,('DATABASE')
,('DELETE')
,('DISTINCT')
,('ELSE')
,('EXISTS')
,('FALSE')
,('FOLLOWING')
,('FOR')
,('FROM')
,('FULL')
,('GRANT')
,('GROUP')
,('GSCLUSTER')
,('HAVING')
,('ILIKE')
,('IN')
,('INCREMENT')
,('INNER')
,('INSERT')
,('INTERSECT')
,('INTO')
,('IS')
,('ISSUE')
,('JOIN')
,('LATERAL')
,('LEFT')
,('LIKE')
,('LOCALTIME')
,('LOCALTIMESTAMP')
,('MINUS')
,('NATURAL')
,('OF')
,('ON')
,('OR')
,('ORDER')
,('ORGANIZATION')
,('QUALIFY')
,('REGEXP')
,('REVOKE')
,('RIGHT')
,('RLIKE')
,('ROW')
,('ROWS')
,('SAMPLE')
,('SELECT')
,('SET')
,('SOME')
,('START')
,('TABLESAMPLE')
,('THEN')
,('TO')
,('TRIGGER')
,('TRUE')
,('TRY_CAST')
,('UNION')
,('UNIQUE')
,('UPDATE')
,('USING')
,('VALUES')
,('VIEW')
,('WHEN')
,('WHENEVER')
,('WHERE')
,('WITH')
) AS SNOWFLAKE_RESERVED_WORDS(SNOWFLAKE_RESERVED_WORD)