International

3 clues
I.B.M. unit
Cosmopolitan
Contest between teams from different countries
Similar answers:
Antinationalist
Augustanational
Conational
Educational
Educationalfilm
Educationaltoy
Equational
Exhaustintern
Glaciernational
Grandnational
Gravitational
Grossnationalconduct
Hebrewnational
Igetinterns
Imezoneinternetr
Imitational
Inspirational
Intern
Internal
Internalaffairs