The crossword solutions for the term Tesla or Watt are 'OHM' and 'AMP'. Nikola Tesla and James Watt were two of the most influential inventors in history. Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, physicist, and futurist who is best known for his contributions to the design of the modern alternating current electricity supply system. Watt was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the world at large. Both Tesla and Watt made significant contributions to the field of electricity, and their respective units of measurement, the ohm and the ampere, are named after them.