Appendage and Flaps

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

Flaps and appendage are semantically related. In some cases you can replace term "Flaps" with "Appendage", this nouns are similar.

Nearby Words: append, appended, appending

Flaps noun - A movable airfoil that is part of an aircraft wing; used to increase lift or drag.

Appendage and flaps are semantically related. Sometimes you can use "Appendage" instead a noun "Flaps".