isogram
Word without repetition
An isogram is a word in which no letter appears more than once.
Subdermatoglyphic is often cited as the longest isogram in English.
The term appears mainly in word games and linguistic puzzles.
Also called a nonpattern word or heterogram.
Reversible letter sequence
- pangramAll-letter sentence
- wordgameLinguistic recreational activity
- cryptogramCoded message puzzle
- cipherHidden writing system
puzzle · brainteaser · crossword · scrabble · tiles · rack · spelling · orthography
Occurring only once
- distinctClearly distinguishable, separate
- unrepeatedHappening only once
- singularOne in number
- varietyState of being diverse
Seldom occurring or found
- obscureUnknown to most
- esotericAccessible to few
- nicheRecessed wall space
- specializedAdapted for particular function
technical · trivia · curiosity · novelty · unusual · logophile
Bounding line of shape
- isothermConstant-temperature boundary line
- isolineLine joining equal points
- isochroneLine of equal travel duration
- topographyPhysical feature mapping
elevation · mapping · chart · gradient · interval · pressure · temperature · precipitation
palindrome
Reversible letter sequence
- pangramAll-letter sentence
- wordgameLinguistic recreational activity
- cryptogramCoded message puzzle
cipher · puzzle · brainteaser · crossword · scrabble · tiles · rack · spelling · orthography · alphabet
nonrepeating
Occurring only once
- distinctClearly distinguishable, separate
- unrepeatedHappening only once
- singularOne in number
variety · pattern · constraint · sequence · alphanumeric
uncommon
Seldom occurring or found
specialized · technical · trivia · curiosity · novelty · unusual · logophile
contour
Bounding line of shape
- isothermConstant-temperature boundary line
- isolineLine joining equal points
- isochroneLine of equal travel duration
topography · elevation · mapping · chart · gradient · interval · pressure · temperature · precipitation · atlas
isogramlogogram
Symbol representing entire word
banana · Mississippi · abracadabra · bookkeeper · committee