knapskull, knapscull or knapscal /napˈskəl/ (obs Scot)

A kind of helmet

• suboceanic
• suboctave
• suboctave coupler
• suboctaves
• suboctuple
• subocular
• suboffice
• subofficer
• subofficers
• suboffices
• subopercula
• subopercular
• suboperculum
• suboptimal
• suborbital
• suborder
• suborders
• subordinacy
• subordinal
• subordinaries
• subordinary
• subordinate
• subordinate clause
• subordinate clauses
• subordinated