Dangerous, getting this type of thing to a manager.
Only semi-tested, but this should get you there:
OBJECT_NAME(c.object_id) AS thetable
FROM sys.index_columns AS ic
RIGHT OUTER JOIN sys.columns AS c
ON ic.object_id = c.object_id
AND ic.column_id = c.column_id
WHERE ic.object_id IS null
Run this on the DB for which you want the info.
Please check back with us if your manager gives you any action items/ directions around this. I just have a bad feeling I know where that manager is headed...