The scientist substantiates his theory with experimental evidence.

She is substantiating her claims with evidence.

The scientist substantiated her theory with extensive research.

The substantialities of the argument were carefully considered.

The substantialness of the building was evident in its sturdy construction.

Substantialism is a philosophical theory that emphasizes the importance of substance or essence.

There are many substantialisms in his writing.

She is substantializing her dreams into reality.

Substantialization is the act of making something substantial or real.

There are many substantializations in this book.