Open English Wordnet
Nouns
(n)proportion, proportionality, balanceharmonious arrangement or relation of parts or elements within a whole (as in a design)“in all perfectly beautiful objects there is found the opposition of one part to another and a reciprocal balance” (John Ruskin)
(n)symmetry, symmetricalness, correspondence, balance(mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane
(n)counterweight, counterbalance, counterpoise, balance, equalizer, equalisera weight that balances another weight
(n)balance wheel, balancea wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat
Verbs
(v)balance, equilibrate, equilibrize, equilibrisebring into balance or equilibrium“She has to balance work and her domestic duties”, “balance the two weights”