Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun understructure

1 sense of understructure

Sense 1
foundation, base, fundament, foot, groundwork, substructure, understructure -- (lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower")
       => support -- (supporting structure that holds up or provides a foundation; "the statue stood on a marble support")