Synonyms of substratum

1. substrate, substratum, surface: usage: a surface on which an organism grows or is attached; "the gardener talked about the proper substrate for acid-loving plants"
2. substrate, substratum, stratum: usage: any stratum or layer lying underneath another
3. substrate, substratum, indigenous language: usage: an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population; "the Celtic languages of Britain are a substrate for English"