substratums

• plural

  plural

  The grammatical form denoting more than one person, place, thing, or idea.

  of substratum.
  substratum

  noun

  something that is spread or laid under something else; a stratum or layer lying under another.

More Suggestions

• substrate
• substructure
• superstratum
• adstratum
• stratum
• stratus
• subserous
• substation
• substitute