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10-Letter Cryptarithms
The Contest Center
59 DeGarmo Hills Road
Wappingers Falls, NY 12590
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       It is easy to construct addition Cryptarithms where all of the words are the same length, provided that the length is from 5 to 7 letters. A few top experts can construct 8-letter Cryptarithms. The Contest Center likes to push the envelope. Here is a selection of Cryptarithms using only 10-letter words. (11 letters is presumably impossible. Check the end of this webpage for some samples.)
       Each puzzle is an addition in which the digits have been replaced (encoded) by letters. Your job is to reconstruct the addition by logic and trial. Some of the puzzles are quite easy. A few are fairly hard.
       Each letter always represent the same digit throughout a puzzle, so if A represents 5 in one place, it represents 5 everywhere. Of course, each puzzle uses a different representation (encoding).
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A C C E L E R A T E
C A P I T A L I S T


E R Y S I P E L A S



A C C U M U L A T E
U N T E N A N T E D


M U L T I M E D I A



A E S T H E T I C S
I N A C T I V A T E


C O N V E N I E N T



A L T E R N A T O R
E N D A N G E R E D


R E A R M A M E N T



A L T E R N A T O R
T A R A N T E L L A


O R A T O R I C A L



A M A N U E N S I S
L I T E R A L I S M


T A R A N T E L L A



A N I M A D V E R T
D E T E R M I N E D


W I N T E R T I M E



A N T I C A N C E R
R E L E N T L E S S


E L E C T R O N I C



A N T I P R O T O N
C O N G R E G A T E


G E O C E N T R I C



A T T A I N M E N T
D E R M A T I T I S


S I D E S A D D L E



A T T A I N M E N T
S A N I T A T I O N


D I S S O C I A T E



B A T T L E M E N T
M I L L I L I T E R


T O R R E N T I A L



C A N T O N M E N T
T R A N S I T I O N


A N T I C A N C E R



C E N T I M E T E R
D O M I N A T I O N


E N D E A R M E N T



C O N C U S S I O N
F I S T I C U F F S


U N D E F E N D E D



C O N S C I E N C E
D I S P O S S E S S


M A C E D O N I A N



C O N T E N T I O N
E L E C T R O N I C


U N C U L T U R E D



D E P E N D E N C Y
E P I N E P H R I N


P Y R I M I D I N E



D E S C E N D E N T
U N D E T E C T E D


C O N V I C T I O N



D I S P O S S E S S
S T E R E O T Y P E


R O T O T I L L E R



D I S S E N S I O N
S T E W A R D E S S


I N O R D I N A T E



E L E C T O R A T E
W A T E R C O L O R


R E C O I L L E S S



E L E C T R O N I C
I R R E L E V A N T


C O N T E N T I O N



E P I N E P H R I N
I N V E T E R A T E


P E N T A M E T E R



E P I N E P H R I N
P R O T R A C T O R


A N T I C I P A T E



E S C U T C H E O N
T O U C H S T O N E


C R O S S R E F E R



F I F T Y F I F T Y
U R I N A L Y S I S


N A T U R A L I S T



F L A S H L I G H T
L I T H U A N I A N


U N F A I T H F U L



H A N D M E D O W N
O P E N H A N D E D


D E P E N D E N C E



H E R M E T I C A L
M I L L I M E T E R


A T T R A C T A N T



I N S E N T I E N T
R O T I S S E R I E


P L A N T A T I O N



I N S E N T I E N T
T A T T E R S A L L


M I L I T A R I S M



I N T R A S T A T E
T E C H N I C I A N


S T E P P A R E N T



M A R I O N E T T E
S E T T L E M E N T


T R A N S I T I O N



M I L L I L I T E R
T R I P A R T I T E


P E N I C I L L I N



M I L L I M E T E R
S E A M S T R E S S


A C C U M U L A T E



P E R P E T R A T E
S U P E R P O W E R


R O U S T A B O U T



P O S T M A S T E R
S E N E S C E N C E


E S C A R P M E N T



P R O S P E R O U S
R E P E R T O I R E


T H E R M I S T O R



R A D I O S O N D E
T R A N S I T I O N


A S S O R T M E N T



R O U N D H O U S E
U N S T R E S S E D


E S C U T C H E O N



S T E P P A R E N T
T A T T L E T A L E


E N D A N G E R E D



S T E P P A R E N T
T A T T L E T A L E


P E N I C I L L I N


       Looking for tougher Cryptarithms? Try these 10-letter Triples. 


A C C E N T U A T E
C O N C E R T I N A
T R A N S S O N I C


I N S T R U C T O R



A P O L I T I C A L
P E N I C I L L I N
P I C K P O C K E T


K N I C K K N A C K



A P P A R I T I O N
I N T O L E R A N T
O R A T O R I C A L


E L E C T R O N I C



A T T R A C T A N T
C E N T I M E T E R
P A R A M E C I U M


U N A M E R I C A N



 C O L L A T E R A L
 R E A L L O C A T E
 S T A T I S T I C S


 P R O P R I E T O R



 D E E P R O O T E D
 I N S E N T I E N T
 P I E D A T E R R E


 A S P I R A T I O N



 I M P R E S A R I O
 P A R A T R O O P S
 T E T R A M E T E R


 A S P I R A T I O N


       Being an over-achiever, I could not stop until I had tried longer words. Here are two 11-letter additions. 


A F F E C T A T I O N
R E C O N N O I T E R


C O N T A M I N A T E



C O I N C I D E N C E
E L E C T R I C I A N


A C C E L E R A T O R


       Is it possible to construct a Cryptarithm based on the sum of three 11-letter words? Almost.


(Check out the 4th and 11th columns here) 
  C O M P R O M I S E
S T R E T C H I E S T
M I C R O S C O P I C


H O M E S T R E T C H



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