I suppose you are asking for the DB2 equivalent of Oracle's SYNONYMS and SNAPSHOTS, right ?
In DB2, SYNONYMS are known as ALIAS an and SNAPSHOTS are kind of a TABLE.
Both of these can be found in the SYSCAT.TABLES catalog view.
Here's a sample query
SELECT TABSCHEMA,
TABNAME,
CASE TYPE
WHEN 'A' THEN 'ALIAS'
WHEN 'S' THEN 'MQT'
END CASE
FROM SYSCAT.TABLES
WHERE TYPE IN ('A', 'S')