ancillary /an-silˈə-ri or anˈsi-lə-ri/

1. Auxiliary
2. Supplementary
3. Subsidiary
4. Subordinate
5. (of computer equipment) additional in any way, not a necessary part of the computing process
6. Subserving
7. Ministering

An ancillary thing

• knapper
• knappers
• knapping
• knapping-hammer
• knapping-hammers
• knapple
• knappled
• knapples
• knappling
• knaps
• knapsack
• knapsacks
• knapscal
• knapscals
• knapscull
• knapsculls
• knapskull
• knapskulls
• knapweed
• knapweeds
• knar
• knarl
• knarls
• knarred
• knars