If you collect stamps, you are a philatelist!
How did this word’s usage come about? The story goes……
“George Herpin was a French stamp fancier back in the 1860s, when stamps were a fairly new invention. Before stamps, the recipient of a letter – not the sender – had to pay the postage. Stamps forced the sender to foot the bill, and created a lot of stamp lovers among folks on the receiving end of the mail – and a mania for stamp collecting.
“Timbromania” was toyed with as a term for this new hobby – from the French word for stamp, “timbre.” But when Herpin suggested “philatélie” (anglicized to “philately”), combining the Greek root phil-, meaning “loving,” with Greek ateleia, meaning “tax-exemption,” stamp lovers everywhere took a fancy to it and the name stuck.”