How to save same record in two entities

I have two custom entities

1) Medical 

2) Kitchen

I want such a functionality where adding one record to Medical automatically shows that record to the people who have access to Kitchen. Or think of it as adding a record in Medical should show in Kitchens too(as it is nothing changed).

what should I do? Workflow? mapping? or is there another way. I am new to crm 2011 btw

Thanks in advance