Difference between Flying Saucer and Unidentified Flying Object

FLYING SAUCER vs UNIDENTIFIED FLYING OBJECT: NOUN

In fiction, an alien interplanetary vessel with a disc-like shape and generally metallic appearance.
An unidentified flying object; UFO; usually with disc-like properties.
An unidentified flying object of presumed extraterrestrial origin, typically described as a luminous moving disk.
An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins

An alien spacecraft. More commonly called a UFO.
Anything not readily explainable appearing to move through or be suspended in the air, primarily used to refer to objects that seem to be at least of small familiar aircraft size. Abbreviated UFO.
A flying saucer.
A flying or apparently flying object of an unknown nature, especially one suspected to have been sent by extraterrestrial beings.
An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins

Stealth bomber, Glider, Geodesic dome, Outer space, Hang glider, Meteorite, Extraterrestrial, Pterodactyl, Meteor, Balloon, Ornithopter, Dirigible, Spaceship, Ufo, Unidentified flying object

Saucer, Machine, Airspeed, Whistle, Gyropigeon, Kite, Flight, Uso, Deal, Unidentified flying object, Ufology, Bogey, Flying saucer, Bogy, Ufo

Airship, Stealth bomber, Glider, Geodesic dome, Outer space, Hang glider, Meteorite, Extraterrestrial, Pterodactyl, Meteor, Balloon, Ornithopter, Dirigible, Spaceship, Ufo

Vague, Hover, Launder, Whiz, Saucer, Machine, Airspeed, Whistle, Kite, Flight, Deal, Ufology, Bogey, Bogy, Ufo

George commuted to work in a flying saucer with a transparent top.
Flying Saucer ice cream sandwiches and other novelties in the freezer cases on toney Jobs Lane, Southampton.
The PDF module uses the Flying Saucer project.
Apparently, even Presidents Gerald Ford and Jimmy Carter were drawn into the flying saucer craze.
This proposal defines both UFO and the Flying Saucer terms as one single meaning.
We extensively use Flying Saucer to generate PDFs from GSPs in our grails applications.
Vessel unlikely to survive being in contact with a flying saucer?
MAKE OUT the outline of a flying saucer in this photo.
Flying Saucer, in search of the missing nuclear warheads.
Then find out how to investigate a flying saucer.

An unidentified flying object of some sort spotted off the coast of Florida appears to have a completely earthly explanation.
This is the commander at the Combat Alert Center, and we have an unidentified flying object.
She turned to the alien and asked Does U.F.O. stand for Unidentified Flying Object?.
Hello Army missile base I wanna report an unidentified flying object over Jellystone Park.
This photograph was taken by a tourist and shows an Unidentified Flying Object, flying over Romanian territory near Cluj town Sept.
A UFO (Unidentified Flying Object) is any object flying in the sky which cannot be identified by the person who sees it.