solemnity, soberness, somberness, graveness, sobriety, gravitational force, gravitation, gravitational attraction, antigravitational, buoyancy, more...

levity, buoyancy, lightness, ascent, rise

Newtonian, Einsteinian, quantum, more...

specific, low, high, utmost, quantum, greater, average, extreme, apparent, artificial, mock

g force cause,   kind of force,   cosmic force,   unseen force,   heavy importance,   downward force,   principle force,   attraction force,   weight seriousness