You searched for: “aerophilately”
aerophilately (s) (noun), aerophilatelies (pl)
The collecting of airmail stamps: Jack had a new hobby of aerophilately, and not only did he start accumulating stamps from all over the world, but he also studied the cancellations on the stamps and envelopes which he also saved.
This entry is located in the following units: aero-, aer-, aeri- (page 7) philo-, phil-, -phile, -philia, -philic, -philous, -phily, -philiac, -philist, -philism (page 3)