Dynamic linking of Two Tables

Dear Friends,

Help me with this scenario...

I have two tables, suppose Table A & Table B.

Table A has 8 fields and Table B has 4 fields that are present in table A, but with different names. i.e.,the 4 fields in Table B refer to 4 fields in Table A but they are mentioned with different names in Table B.

Now when I make modifications in Table A, the corresponding fields(the fields which are in different names) in Table B also should get modified and when I modify in Table B and click a Save Button, it should get reflected in Table A also.

Please help me friends....!