1. An extra component of a machine or other apparatus
   - spare

Derived forms: spare parts

Type of: component, constituent, element

Encyclopedia: Spare part

• scala
• scalability
• scalable
• scalage
• scalar
• scalar field
• scalar matrix
• scalar product
• scalariform
• scalawag
• scald
• scalded milk
• scale
• scale down
• scale factor
• scale fern
• scale insect
• scale leaf
• scale moss
• scale of C major
• scale of measurement
• scale up
• scale value
• scale wax
• scaled