ACK
abject apology
acceptance
acknowledgments
acquittance
admission
allowance
answer
answering
antiphon
apology
appreciation
avowal
back
back answer
back matter
back talk
backchat
bastard title
benediction
bibliography
billet
blurb
boost
breast-beating
buildup
business letter
by-line
canceled check
catch line
catchword
chit
citation
cognizance
colophon
comeback
commendation
communication
concession
confession
contents
contents page
contrition
copyright page
credit
credit line
acknowledgement
approval
assent
assurance
compliment
declaration
deference
denial
disapproval
encouragement
gratitude
greet
homage
nod
recognition
submission
surrender
tribute