Extension and Retrofit

Extension noun - The act of making longer.

Retrofit and extension are semantically related. In some cases you can use "Retrofit" instead a noun "Extension".

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

Retrofit noun - A component or accessory added to something after it has been manufactured.

Extension and retrofit are semantically related. Sometimes you can use "Extension" instead a noun "Retrofit".

Nearby Words: retrofitted, retrofitting