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

He aced every test

to ache to do something

aches and pains

to achieve a great deal

to achieve great things

to achieve a good reputation

to be achieved at a high cost in human life

Achilles’ heel

to be aching all over

acid

acid head

acid test

to do acid

to be acquainted with Henry Miller

to acquiesce in an arrangement

I acquiesced in it.

I acquire a language.

to acquire a taste for it

to acquire a fortune