noun
1.
Synonyms: basis 1, base, bedrock, footing, foundation, ground, groundwork, infrastructure, root, substratum
2.
Synonyms: base 1, footing, foundation, groundwork, infrastructure, seat, seating, substruction, substructure, understructure
3.
Synonyms: support 3, brace, buttress, column, prop, shore, stay, underpinner, underpropping