cosignatory or co-signatory/kohʹsignət(ə)ri/ noun (pl -ies) (pl cosignatories)

• double
• double act
• double agent
• double bar
• double-barrelled
• double bass
• double bassoon
• double bed
• double bill
• double bind
• double-blind
• double bluff
• double bogey
• double boiler
• double bond
• double-book
• double-breasted
• double-check
• double chin
• double-click
• double concerto
• double cream
• double-cross
• double dagger
• double-dealing