We don't have synonyms for band gap yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bandgap, wind gap and band saw.
(N) :
In solid-state physics and solid-state chemistry, a band gap, also called a bandgap or energy gap, is an energy range in a solid where no electronic states exist.
(N) :
In solid-state physics and solid-state chemistry, a band gap, also called a bandgap or energy gap, is an energy range in a solid where no electronic states exist.