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Q: What exceptional words contain other words?

A:
   longest non-trivial charade  MEN-IN-GO-EN-CEP-HA-LO-MY-EL-IT-IS-ES (26)
    longest forward and reverse charade
     MAT-HE-MA-TI-CAL, LAC-IT-AM-EH-TAM (12)
   longest snowball or rhopalic  A-DE-NOA-CANT-HOMAS I-NS-TAN-TANE-ITIES
    O-VE-REL-ABOR-ATING O-VE-REM-BELL-ISHES (15)
   longest reverse rhopalic  HETERO-TRANS-PLAN-TAT-IO-N
    STEREO-PHOTO-GRAM-MET-RI-C (21)
   longest linkade or word chain
    2-letter words  CODETERMINATIONS REDETERMINATIONS (16)
    3-letter words  CHICHIPATES COOPERATING COOPERATORS GRANULATING
     GRANULATORS HOOPERATING METABORATES PROTONATING TARAHUMARAS
     TARAHUMARES (11)
    4-letter words  ADAMANTS ANANASES BRAKINGS CHAMISES COPALITE ECHOLESS
     EPICALLY ETCHINGS FLANERIE FRAMINGS GAMELANG GAMELANS ITCHINGS KAMASINS
     MALARIAL MALARIAS PARAKEET PLANESES PREPOSES PRIMUSES PROPENDS PROPENSE (8)
    5-letter words  COMANITOS TRAVERSES (9)
   longest charlinkade  FORESTALL: FOREST, ALL; FORE, REST, TALL (9)
   longest alternade  CARPETWEEDS: CREWES, APTED  CURTAINLESS: CRANES, UTILS
    TRIENNIALLY: TINILY, RENAL (11)
   shortest three-letter-minimum word deletions
    PILGRIMAGE: RIM, GAG, PILE; GRIM, LAG, PIE
   highest ratio of subwords/length (logogram)
    WAGONERS: WAGONERS, WAGONER, WAGON, WAG, WA, W, AGONE, AGON, AGO, AG, A,
     GONERS, GONER, GONE, GON, GO, G, ONERS, ONER, ONE, ON, O, NE, N,
     ERS, ER, E, RS, R, S (30/8)
    including reversed subwords (bi-logogram)
     DENOTATES: DENOTATES, DENOTATE, ATONED, TONED, ONED, DEN, DE, D,
      ATONE, TONE, ONE, EN, E, NOTATES, NOTATE, NOTA, NOT, NO, N,
      OTATES, OTATE, ATO, TO, O, TATES, TATE, TAT, TA, T, ATES, ATE, AT, A,
      TES, TE, ES, S (37/9)
''''''''''''
Unless noted otherwise, all words occur in Webster's Third New International
Dictionary, Merriam-Webster, Springfield, MA, 1961.
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