Defn: One who builds a superstructure. [R.] R. North.

SUPERSTRUCTURE
Su`per*struc"ture, n. Etym: [Cf. F. superstructure.]

1. Any material structure or edifice built on something else; that which is raised on a foundation or basis; esp. (Arch.),

Defn: all that part of a building above the basement. Also used
figuratively.
You have added to your natural endowments the superstructure of
study. Dryden.

2. (Railway Engin.)

Defn: The sleepers, and fastenings, in distinction from the roadbed.

SUPERSUBSTANTIAL Su`per*sub*stan"tial, a. Etym: [Pref. super- + substantial: cf. F. supersubstantiel.]

Defn: More than substantial; spiritual. "The heavenly supersubstantial bread." Jer. Taylor.

SUPERSUBTLE
Su`per*sub"tle, a.

Defn: To subtle. Shak.