• interprations,
• interelations,
• interpoltions,
• intercalations,
• interpreations,
• interpetations,
• interperations,
• interpitations,
• interpatations,
• interptations,
• interopolations,
• interploations,
• interpoltaions,
• interpoletions,
• interpozitions,
• interpostions,
• interpoltations,
• interpolashons,
• interporaitions,
• intrupolations

• interpenetration,
• interpretation,
• internationally,
• intermediation,
• interpellate,
• internalisation,
• intersection,
• interrelationship,
• intercalation,
• interactional,
• interoception,
• internationalize,
• interplanetary,
• internationale,
• interrogation,
• interrogatory,
• interaction,
• internationality,
• interruption,
• intervention,
• interjection,
• interpolation,
• internationalise,
• internationalist,
• internalization,
• interpretative,
• interposition,
• international law,
• internationalism,
• interception,
• interpellation,
• interrogator,
• interscholastic,
• interrelation,
• intergalactic,
• interpolate,
• interpersonal,
• international,
• interdiction,
• interstratify.

The adjective form of "interpolations" is "interpolative".