We don't have synonyms for gamma yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are gamba, mamma and gammy.
(n) :
the name of the third letter of the Greekalphabet (?, ?), preceded by beta (?, ?) and followed by delta, (?, ?); the Gamma function, symbolized by ?
(n) :
the name of the third letter of the Greekalphabet (?, ?), preceded by beta (?, ?) and followed by delta, (?, ?); the Gamma function, symbolized by ?