Definition of super- 

a(1): over and above : higher in quantity, quality, or degree than  more than : superhuman

b(1): exceeding or so as to exceed a norm: superheat

(2): in or to an extreme or excessive degree or intensity: supersubtle

c: surpassing all or most others of its kind: superhighway

Definition of -naut

a. Forms nouns meaning a voyager or farer: astronaut

Definition of Supernaut

a. A voyager in excellence, one who strives for betterment. Someone who works to make their life better. One who exceeds the norm. One who performs, acts or upholds oneself to higher standards.