correct, equal, even, exact, ideal, necessary, optimal, optimum, perfect, proper, right
With children, it is important to achieve the right balance between love and discipline.

comfortable, excellent, good, happy, harmonious, healthy
a healthy balance of foods

acceptable, appropriate, fair, reasonable, sensible (BrE)
How do you find an acceptable balance between closeness and distance in a relationship?

careful, delicate, fine (esp. BrE), subtle
Being a good boss requires a fine balance between kindness and authority.

fragile, precarious, uneasy
overall
It is the overall balance of the diet that is important.

ecological, natural
Pulling up all the plants will disturb the natural balance of the pond.

hormonal, nutritional
work-life
ethnic, gender, racial, social
There is an even gender balance among staff and students.

require
seek
achieve, attain, create, find, strike
We need to strike a balance between these conflicting interests.

keep, maintain, preserve, sustain
You have to maintain a balance in your life or else you'll go crazy.

improve
ways to improve your work-life balance

disrupt, disturb, upset
Tourists often disturb the delicate balance of nature on the island.

redress, re-establish, restore
affect
adjust, alter, change, shift

change, shift

on balance (= after considering all the information)
On balance, the company has had a successful year.

in balance
It is important to keep the different aspects of your life in balance.

balance between
the balance between academic and practical work

balance of
the balance of animals and plants in the environment

the balance of nature

changing, shifting
military, political
competitive

affect
change, shift
swing (esp. BrE), tilt, tip
In an interview, good presentation can tip the balance your way.

change, shift, swing, tilt
He argues that the balance has swung too far in favour/favor of capitalism.

the balance of advantage (esp. BrE)
The balance of advantage has shifted from the unions to employers.

the balance of forces
They assessed the balance of forces between Israel and other countries.

the balance of power
Who holds the balance of power in this relationship?
There was a dramatic shift in the balance of power.

checks and balances
Democracy depends on a system of checks and balances.

excellent, good
poor

have
Gymnasts have excellent balance.

affect
Tightness in one set of muscles will affect your whole balance.

improve
Yoga improves balance as well as flexibility.

keep
I struggled to keep my balance on my new skates.

lose
She lost her balance and fell.

catch (esp. AmE), recover, regain
adjust
He set his feet wider and adjusted his balance.

knock sb off, throw sb off
The sudden movement threw him off balance.

beam (esp. AmE)
The gymnasts finish with floor exercises and the balance beam.

off balance

a sense of balance
Cats have a very good sense of balance.

account, bank
cash, money
credit, favourable/favorable, healthy, positive
debit, negative
cleared (BrE), net
Interest is calculated on the daily cleared balance and paid direct to your account.

opening
final (esp. BrE), outstanding
trade

have
Everyone likes to have a healthy bank balance.

ask for, request
He asked the cashier for the balance of his current account.

check
I'll need to check my bank balance before I spend so much money.

show
be due
The final balance is due six weeks before departure.

pay
I'll pay the balance later.

use
The balance of the proceeds will be used for new equipment.

bring forward, carry forward
the balance brought forward from the previous year

the balance of payments, the balance of trade

carefully, delicately, precariously

on
He balanced the glasses carefully on the tray.

beautifully, delicately, evenly, finely, nicely, perfectly
The song perfectly balances melody and rhythm.

have to, need to
seek to, try to
The plan seeks to balance two important objectives.

manage to
fail to
The party lost because it failed to balance economic growth with social equity.

against
We have to balance the risks of the new strategy against the possible benefits.

with
She tries to balance the needs of her children with those of her employer.

Balance is used with these nouns as the subject:
force

Balance is used with these nouns as the object:
budget, demand, equation, force, need, scales, tray