Synonyms for retrospective:
show, date back to, date from, thoughtful.
holdover, predecessor, hangover, historically, timeline, forerunner.
Other synonyms and related words:
historically, early, predecessor, show, thoughtful, timeline, ex post facto, hangover.
concerned with past (adjective)
ex post facto (adjective)
Sense 1 (noun)
Sense 2 (noun)
date back to, historically, early.
Sense 3 (noun)
retroactive, retro, ex post facto.
Usage examples for retrospective: