airmail

As nouns the difference between courier and airmail

is that courier is a person who looks after and guides tourists while airmail is the system of conveying mail using aircraft.

As verbs the difference between courier and airmail

is that courier is to deliver by courier while airmail is to send mail by air.

As a proper noun Courier

is a monospace font that resembles the characters produced by a typewriter.

As an adjective airmail is

of, or relating to such a system.

As nouns the difference between airmail and email

is that airmail is the system of conveying mail using aircraft while email is a raised or embossed image pressed into metal, such as a seal pressed into a foil and attached to a document.

As verbs the difference between airmail and email

is that airmail is to send mail by air while email is an alternative spelling of lang=en.

As an adjective airmail

is of, or relating to such a system.