1. (n.) Same as Substruction.
2. (n.) An under structure; a foundation; groundwork.
Thesaurus Entries
base, basement, basis, bearing wall, bed, bedding, bedrock, bottom, floor, flooring, fond, footing, foundation, fundament, fundamental, ground, grounds, groundwork, hardpan, infrastructure, pavement, principle, radical, riprap, rock bottom, rudiment, seat, sill, solid ground, solid rock, stereobate, stylobate, substratum, substruction, terra firma, underbuilding, undercarriage, undergirding, underpinning, understruction, understructure
