Synonyms for File name extension:

• n.

  •communication (noun)
  • filename extension,
  • extension,
  • file name extension.

• Other synonyms:

  •n.
  • string.

Holonyms for File name extension:

• n.

  • communication
    file name, computer file name, computer filename, filename.

Hyponym for File name extension:

• n.

  • communication
    string.