Aerospace
Part of speech: adjective
Definition: Of, or relating to the Earth's atmosphere and nearby space. Of, or relating to the science, technology and industry associated with aircraft, missiles, satellites and spacecraft.
Part of speech: noun
Definition: The atmosphere of the Earth and the region of space around it. The industry concerned with aircraft, missiles, satellites and spacecraft.
Aviation
Part of speech: noun
Definition: The art or science of flying.
Example sentence: Aviation offered such fun as crossing the continent in planes large and small, trying the whirling rotors of an autogiro, making record flights. With these activities came opportunity to know women everywhere who shared my conviction that there is so much women can do in the modern world and should be permitted to do irrespective of their sex.