What exceptional words turn into other words by deletion of letters?

beheadable (delete first letter and form a word)
   longest E(MOTIONLESSNESSES) P(REDETERMINATIONS) (17)
   longest for each letter  APATHETICALLY, BLITHESOME, CHASTENINGS,
    DEMULSIFICATIONS, EMOTIONLESSNESSES, FUTILITARIANISM, GASTRONOMICALLY,
    HEDRIOPHTHALMA, IDENTIFICATIONS, JUNCTIONAL, KINAESTHETICS, LIMITABLENESS,
    METHYLACETYLENES, NEOPALEOZOIC, OENANTHALDEHYDES, PREDETERMINATIONS,
    QUINTA, REVOLUTIONARILY, SELECTIVENESS, TREASONABLENESS, UPRAISERS,
    VINDICATIONS, WHENCEFORWARD, XANTHOPHYLLITES, YOURSELVES, ZOOSPORIFEROUS
   longest progressive (down to a single letter)  PRESTATES (9)
curtailable (delete last letter and form a word)
   longest curtailable (no -s or -y)  ENTWICKSLUNGROMANE
    GINGLYMOARTHRODIAL PALAEODICTYOPTERAN PHOSPHOAMINOLIPIDE (17)
   longest progressive  COMPOSERS LAMBASTE(D,S) MACHISMOS PINDARICS (9)
alternately beheadable and curtailable (down to a single letter)
   longest  ASHANGOS ASTERNAL BATHINGS BRAIDERS CURATESS ESCAPEDS FLAMING(O,S)
    GAMINESS LATHINGS METHANES METHINES OOBLASTS RELATERS SAGENESS SPARSEST (8)
progressive beheadable and curtailable (all subsequences words)
   longest  AMIDES AREARS BLOWED COPENS FANALS GAGERS LAVERS MODELS SHADES
    TAVERS WAGERS (6)
terminal ellision (delete both first and last character and form a word)
   longest  ARHYNCHOBDELLIDA (16)  (no a-)  REMANCIPATION (13)
letter subtraction (delete letter anywhere and form a word)
   longest progressive
    CHEREMISSES, CHEREMISES, CHEREMISS, CHEREMIS, CHEREMS, HEREMS, HERMS, HEMS,
        EMS, MS, S (11)
    CHOROLOGIES, HOROLOGIES, OROLOGIES, OOLOGIES, OLOGIES, LOGIES, LOGES, LOGS,
        LOS, OS, S (11)
    GNOMOLOGIES, NOMOLOGIES, NOOLOGIES, OOLOGIES, OLOGIES, LOGIES, LOGES, LOGS,
        LOS, OS, S (11)
    OESTRUATING, ESTRUATING, ESTUATING, ESTATING, STATING, SATING, STING, TING,
        ING, IN, N (11)
    ONTOLOGIZES, ONTOLOGIES, OTOLOGIES, OOLOGIES, OLOGIES, LOGIES, LOGES, LOGS,
        LOS, OS, S (11)
    PUNCTULATED, PUNCTUATED, PUNCTATED, PUNCTATE, PUNCTAE, PUNCTA, PUNCT, PUNT,
        UNT, UT, T (11)
    SPRINKLINGS, SPRINKLING, PRINKLING, PRINKING, PINKING, PIKING, PIING, PING,
        ING, IN, N (11)
charitable (all possible letter subtractions form a word)
   longest BREADS BREEST FLEETS SHOOPS SHOOTS WHOOPS (6)
   longest progressive (all noncontiguous subsequences words) AIDES PEATS (5)
stingy (no deletion possible)
   shortest PRY (3)
****
Unless noted otherwise, all words occur in Webster's Third New International
Dictionary, Merriam-Webster, Springfield, MA, 1961.

[ Editor: from a 1994 mail to the crossword-games list on "word
  extensions"; no list was given in reply. ]

JK> What about the ever-popular BOW BOWS BOWSE BOWSES?

I like TA TAS TASS TASSE TASSET TASSETS.  I find "symmetrical" words
interesting, too.  Such as PETALINE.  The first five letters are a word
(PETAL) and the last five letters are a word (ALINE).  I wonder if
anybody has compiled a complete list of words whose first X letters
are words, and whose last X letters are words, where X = ANY/ALL
numbers up to the length of the word.  (Three letter example: ANA)

-- Steve Oliger <steve.oliger@labb.com>