Solid

fast

(in the solid state)

kompakt

(lacking holes or hollows)

kraftig

(large, massive)

kraftig

(strong, unyielding (as of foundations etc))

massiv

(lacking holes or hollows)

sammenskriving

(typography: written as one word)

solid

(large, massive)

solid

(lacking holes or hollows)

solid

(extremely filling)

solid

(strong, unyielding (as of foundations etc))

solid

(lacking errors or inconsistencies)