Tectonics rhymes with:
tonics, audiotronics, avionics, centronics, conics, diasonics, electronics, electronics', endotronics, endotronics', fibronics, flextronics, harmonics, histrionics, ionics, lasersonics, lumonics, microelectronics, mnemonics, nucleonics, onyx, personics, philharmonic's, phonics, photronics, plantronics, respironics, sconnix, siliconix, sonics, tektronix, telectronics, telephonics, tonics, vitronics
Tectonics sounds like:
tajikistan's, tastiness, tasting, tastings, techsystems, tectonic, testimonies, testing, thaxton's, ticketing, tightening, tightenings, tightens, tightness, toasting, touchdowns, twisting