by accretion of

interest accrued to my account

accusatory 

acerbic

acerbity 

acid wit

developed quite an acid tongue lately

acock

acolyte

acquiesce 

acquiescence

acquirement 

acquisitive mind

acquit debt

acrid

acridity

acrimonious (dispute)

acrimony 

acrophobia

with arms across

get in on the act 

get your act together