equipoise (n.)

• balance
• ballast
• coextension
• consideration
• correspondence
• counterbalance
• counterpoise
• counterweight
• equality
• equation
• equilibrium
• equity
• equivalence
• equivalent
• evenness
• give-and-take
• identity
• justice
• likeness
• makeweight
• offset
• par
• parallelism
• parity
• poise
• proportion
• setoff
• stasis
• symmetry