A motion picture is a noun. The plural would be motion pictures.
Colin Firth won the Golden Globe for Best Performance by an Actor in a Motion Picture - Drama in 2011 for The King's Speech.
Celerity (swiftness of motion) is a noun. Celebrity is also a noun.
The word "motionless" is an adjective. It describes something that is not moving or lacking in motion.
It is an adverb; adverbs describe an action (verb). The picture was horribly drawn. Horribly is describing how the picture was drawn.
Eadward Muybridge made the motion picture in 1895.
The Motion Picture Association of America.
Motion Picture Herald was created in 1931.
Motion Picture Herald ended in 1972.
Motion Picture News was created in 1913.
Motion Picture News ended in 1930.
Motion Picture Mayhem was created in 2010.
The first motion picture was The Horse In Motion(1878).