according to custom and usance

according to circumstances

according to weight

to account

to account for a fact

to account for someone/something

of no account

to account someone guilty

on account

on no account

Accountancy is a science

Accounts are not in order

accumulating up to the due date

Accurate preparation is the linchpin of the entire event

accurate to a millimetre

Accurate timing is the linchpin of the entire operation

to accustom oneself to new surroundings

I am accustomed to good society.

ace photographer/reporter

to be ace

He aced every test

to ache to do something

aches and pains

to achieve a great deal

to achieve great things