Synonyms for Long-familiar:

• adj.

  •all (adjective)
  • well-known.

• n.

  •long-familiar (noun)
  • well-known,
  • Familiar.

• Other synonyms:

  •n.
  • well-known.

Antonyms for Long-familiar:

• adj.

  • Other antonyms:
    unfamiliar.