SQL & PL/SQL :: Utl_match Comparing Million Records?

the problem is: 2 tables - one with 2 million records, and the other with 8000 records.

i need to compare for each record in a table if there's a similar string on the other table.

i've created a procedure that does the following:

opens the first cursor (select col1,col2,col3,col4... from table 1)
loop
opens second cursor (select col1 from table 2)
loop
if utl_match(col1, table2.col1) > 80 then
insert col1,col2,col3,col4... into tableX
end if
close second cursor
close first cursor

the thing is that this procedure takes forever to end...about 8 days.

is it because im using the utl_match function? is there a way to speed this up?