centinel or centinell /senˈti-nəl/ obsolete spellings of sentinel

centinel (private) noun

A private soldier

• optimiser
• optimisers
• optimises
• optimising
• optimism
• optimisms
• optimist
• optimistic
• optimistically
• optimists
• optimization
• optimizations
• optimize
• optimized
• optimizer
• optimizers
• optimizes
• optimizing
• optimum
• opt in
• opting
• option
• optional
• optionality
• optionally