. "antigravity" . "Anti-gravity" . . . "kinemassic field generator" . "reverse-gravitational effect" . . . . "Anti-gravity#Thomas Townsend Brown's gravitator" . "Anti-gravity#Apergy" . "reversed gravity" . . "repulsorlift" . "gravity-defying" . . . . "anti-gravity" . "anti-gravitational" . . "counter vertical gravity" . "Anti-gravity" . . "Anti-Grav" .