Word Study
whodunit
OXFORD DICTIONARY
whodunit, n. (also whodunnit) colloq. a story or play about the detection of a crime etc., esp. murder.
Etymology
= who done (illiterate for did) it?
THESAURUS
whodunit
Marchen, Western, Western story, Westerner, adventure story, allegory, apologue, bedtime story, detective story, fable, fabliau, fairy tale, fantasy, fiction, folk story, folktale, gest, ghost story, horse opera, legend, love story, mystery, mystery story, myth, mythology, mythos, nursery tale, parable, romance, science fiction, shocker, space fiction, space opera, suspense story, thriller, work of fictionFor further exploring for "whodunit" in Webster Dictionary Online