plural of back catalog

plural of call back

(tennis, of a receiver) To win a game having lost a service game, or during a tiebreak, to win a point against the serve having lost a point while serving.

plural of flat back four

plural of gentleman of the back door

plural of green-backed firecrown

plural of grey red-backed vole

plural of mortgage-backed security

plural of northern red-backed vole

plural of olive-backed oriole