Seemingly it isn’t possible to let overly long words just wrap around a table cell. In How to wrap long “unbreakable” text in a table cell? it is recommended to insert a ZWS (zero-width space) to indicate word boundaries. This works, but the generated PDF has the problem, that you cannot directly search for the word in Acrobat Reader, but only to the index, where you inserted the ZWS.
Is there a way to measure the width of the table cell and only insert the ZWS when word width exceeds column width?