Design is indeed the correct spelling, yes.
Some example sentences are:
She began to design a new book cover.
She will design her own outfit for the wedding.
We need to design a new teabag shape.
This is a terrible design.
The word meaning "to design" or "to create" is spelt design.
Designed is the past tense of design.
The term is "design technology" (abbreviated D.T., also Design and Technology).
The correct spelling is "design" (to plan or devise).
diseno with a ~ over the N. diseño
The correct spelling is architecture (the design of buildings).
These letters can spell the 6-letter words DESIGN, SIGNED, SINGED, and DEIGNS.
The likely word is design (plan, layout, or blueprint).
That is the correct spelling of "curvature" (a curve in appearance or design).
Design? I'm not 100% sure what word you're asking about
The correct spelling is "structural" (pertaining to a physical construction or design).
The correct spelling of the noun is "designer".