Synonyms for Jam-full:

• adj.

  •congested (adjective)
  • crowded,
  • occluded,
  • chock-full,
  • obstructed,
  • choked,
  • overflowing,
  • Crammed,
  • Mobbed,
  • overcrowded,
  • stuffed,
  • gorged,
  • plugged,
  • packed,
  • stopped,
  • closed,
  • jam-packed,
  • teeming,
  • glutted,
  • jammed.
  •Other relevant words: (adjective)
  • massed,
  • up to the rafters,
  • stoppered,
  • stuffed-up,
  • gridlocked,
  • packed like sardines,
  • congested,
  • overfilled,
  • filled,
  • stuffed up.

Antonyms for Jam-full:

• adj.

  • congested
    empty, clear, uncongested, free, unblocked, unclogged, uncrowded, open.