substructure

About 0.58 uses per million words.

Meaning

1. noun The supporting part of a structure (either physical or organizational; the foundation).
2. noun The earth or gravel that the railway tracks are embedded in.
3. noun Synonym of base (“the forces and relations of production that produce the necessities and amenities of life”).

Similar words

understructure base groundwork foundation fundament foot subgrade infrastructure basis undersupport

Often followed by

of and is in for to was that search

Word family

substructural substructures