Basis and Understructure

Basis noun - An immaterial thing upon which something else rests.

Understructure and basis are semantically related In some cases you can use "Understructure" instead a noun "Basis".

Nearby Word: basic

Understructure noun - Lowest support of a structure.

Basis and understructure are semantically related in base topic. You can use "Basis" instead a noun "Understructure", if it concerns topics such as foundation.