afterthought (n.)

• about-face
• addendum
• appendix
• bind
• block
• blockage
• chorus
• coda
• codicil
• colophon
• conclusion
• consequence
• continuance
• continuation
• delay
• detention
• envoi
• epilogue
• flip
• flip-flop
• follow-through
• follow-up
• halt
• hang-up
• hindrance
• holdup
• interim
• jam
• lag
• lagging
• logjam
• moratorium
• obstruction
• pause
• peroration
• postfix
• postlude
• postscript
• reappraisal
• reconsideration
• refrain
• reprieve
• respite
• retardation
• revaluation
• reversal
• reverse
• review
• sequel
• sequela
• sequitur
• slowdown
• slowness
• stay
• stop
• stoppage
• subscript
• suffix
• supplement
• suspension
• tag
• tergiversation
• tie-up
• turnabout
• turnaround
• volte-face
• wait