Pilot and Preliminary

Pilot adjective - Made or done as an experiment.

Preliminary and pilot are semantically related in experimental topic. In some cases you can use "Preliminary" instead an adjective "Pilot".

Nearby Words: piloted, piloting, pilotage, pilothouse

Preliminary adjective - Coming before the main part or item usually to introduce or prepare for what follows.

Pilot and preliminary are semantically related in first topic. Sometimes you can use "Pilot" instead an adjective "Preliminary", if it concerns topics such as early, introductory.