bank - bench - seat
The bank of a river or lake is the ground at its edge.
There are new developments along both banks of the Thames.
She left her shoes on the bank and dived into the lake.
A bank is also a place where you can keep your money in an account.
You should ask your bank for a loan.
‘bench’ and ‘seat’
Don't call a long, narrow seat in a park or garden a ‘bank’. You call it a bench or a seat.
Greg sat on the bench and waited.
She sat on a seat in the park and read her magazine.