Princeton's WordNet

1. balance(noun)

   a state of equilibrium

   Synonyms:
   remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

   Antonyms:
   instability, unbalance, imbalance

2. balance(noun)

   equality between the totals of the credit and debit sides of an account

   Synonyms:
   remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

   Antonyms:
   unbalance, imbalance, instability

3. proportion, proportionality, balance(noun)

   harmonious arrangement or relation of parts or elements within a whole (as in a design)

   Synonyms:
   remainder, dimension, counterbalance, ratio, proportion, symmetry, equaliser, residual, balance, counterpoise, residuum, rest, counterweight, residue, balance wheel, equilibrium, symmetricalness, equipoise, correspondence, equalizer, proportionality

   Antonyms:
   instability, unbalance, imbalance

4. balance, equilibrium, equipoise, counterbalance(noun)

   equality of distribution

   Synonyms:
   sense of equilibrium, remainder, counterbalance, counterpoise, symmetry, equaliser, residual, balance, equalizer, residuum, rest, counterweight, vestibular sense, residue, proportion, equilibrium, labyrinthine sense, sense of balance, symmetricalness, equipoise, correspondence, offset, balance wheel, proportionality, chemical equilibrium

   Antonyms:
   unbalance, imbalance, instability

5. remainder, balance, residual, residue, residuum, rest(noun)

   something left after other parts have been taken away

   Synonyms:
   remainder, relief, counterbalance, end, quietus, difference, relaxation, symmetry, equaliser, residual, ease, balance, proportion, residuum, rest, repose, equalizer, counterweight, rest period, eternal sleep, residue, sleep, counterpoise, equilibrium, remnant, symmetricalness, equipoise, correspondence, oddment, balance wheel, proportionality, eternal rest, respite

   Antonyms:
   instability, unbalance, imbalance

6. balance(noun)

   the difference between the totals of the credit and debit sides of an account

   Synonyms:
   remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

   Antonyms:
   imbalance, instability, unbalance

7. Libra, Balance(noun)

   (astrology) a person who is born while the sun is in Libra

   Synonyms:
   remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

   Antonyms:
   instability, imbalance, unbalance

8. Libra, Libra the Balance, Balance, Libra the Scales(noun)

   the seventh sign of the zodiac; the sun is in this sign from about September 23 to October 22

   Synonyms:
   remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

   Antonyms:
   unbalance, instability, imbalance

9. symmetry, symmetricalness, correspondence, balance(noun)

   (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane

   Synonyms:
   proportionateness, remainder, counterbalance, equalizer, proportion, commensurateness, symmetry, residuum, equaliser, residual, balance, isotropy, parallelism, rest, counterweight, residue, counterpoise, equilibrium, symmetricalness, equipoise, correspondence, agreement, balance wheel, proportionality

   Antonyms:
   unbalance, imbalance, instability

10. counterweight, counterbalance, counterpoise, balance, equalizer, equaliser(noun)

    a weight that balances another weight

    Synonyms:
    remainder, counterbalance, proportion, symmetry, equaliser, residual, balance, equalizer, residuum, rest, counterweight, residue, counterpoise, equilibrium, symmetricalness, equipoise, correspondence, offset, balance wheel, proportionality

    Antonyms:
    unbalance, imbalance, instability

11. balance wheel, balance(noun)

    a wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat

    Synonyms:
    remainder, counterweight, proportion, symmetry, equaliser, residual, balance, counterpoise, residuum, rest, counterbalance, residue, balance wheel, equilibrium, symmetricalness, equipoise, correspondence, equalizer, proportionality

    Antonyms:
    instability, unbalance, imbalance

12. balance(verb)

    a scale for weighing; depends on pull of gravity

    Synonyms:
    remainder, counterbalance, counterpoise, symmetry, equaliser, residual, equalizer, residuum, rest, counterweight, residue, proportion, equilibrium, symmetricalness, equipoise, correspondence, balance wheel, proportionality

    Antonyms:
    instability, unbalance, imbalance

13. balance, equilibrate, equilibrize, equilibrise(verb)

    bring into balance or equilibrium

    Synonyms:
    equilibrize, poise, equilibrate, balance, equilibrise

    Antonyms:
    instability, unbalance, imbalance

14. balance(verb)

    compute credits and debits of an account

    Synonyms:
    equilibrize, poise, equilibrate, equilibrise

    Antonyms:
    instability, imbalance, unbalance

15. poise, balance(verb)

    hold or carry in equilibrium

    Synonyms:
    equilibrize, brace, poise, equilibrate, balance, equilibrise

    Antonyms:
    imbalance, instability, unbalance

16. balance(verb)

    be in equilibrium

    Synonyms:
    equilibrize, poise, equilibrate, equilibrise

    Antonyms:
    imbalance, instability, unbalance