Appendage and Extension

Appendage noun - Something that is not necessary in itself but adds to the convenience or performance of the main piece of equipment.

Extension is a synonym for appendage in extremity topic. In some cases you can use "Extension" instead a noun "Appendage".

Nearby Words: append, appended, appending

Extension noun - The act of making longer.

Appendage is a synonym for extension in extremity topic. You can use "Appendage" instead a noun "Extension", if it concerns topics such as addition, enlargement, annexe.

Nearby Words: extend, extended, extent, extensive, extensively