Full Idea
Scholastic texts are rife with different senses of 'substantia', using the term to refer, among other things, both to thick concrete entities and to thin metaphysical ones.
Gist of Idea
Scholastics use 'substantia' for thick concrete entities, and for thin metaphysical ones
Source
Robert Pasnau (Metaphysical Themes 1274-1671 [2011], 06.1)
Book Reference
Pasnau,Robert: 'Metaphysical Themes 1274-1671' [OUP 2011], p.102
A Reaction
Pasnau introduces 'thin' and 'thick' substance for this reason. I may adopt this. Without distinctions between thin and thick concepts of things we can get very muddled. I like the word to label something which is an 'entity'.