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13-letter words ending in O

13-letter words ending in O number just 10 in tournament dictionaries, led by the high-scoring INCOMMUNICADO.

10 wordsTop pick GENERALISSIMOHighest score INCOMMUNICADO 22

S ends the most 13-letter words (7,018); K ends the fewest (7). O ranks #16 of 26. The bar under each letter shows the size of its list.

Best words to play first 10 · most-used first

  • GENERALISSIMO16
  • INCOMMUNICADO22
  • STRATOVOLCANO18
  • AGGIORNAMENTO17
  • CONTRAFAGOTTO19
  • FORTISSISSIMO18
  • ILLUSTRISSIMO15
  • PIANISSISSIMO17
  • STACCATISSIMO19
  • SUPERVIRTUOSO18
All valid words 10

A to Z. Includes rare and Collins-only words. Linked tiles open the word's meaning, score and rhymes.

  • AGGIORNAMENTO17
  • CONTRAFAGOTTO19
  • FORTISSISSIMO18
  • GENERALISSIMO16
  • ILLUSTRISSIMO15
  • INCOMMUNICADO22
  • PIANISSISSIMO17
  • STACCATISSIMO19
  • STRATOVOLCANO18
  • SUPERVIRTUOSO18

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses
WordScrabbleWords With FriendsDictionaries
INCOMMUNICADO2229All three
CONTRAFAGOTTO1922Collins only
STACCATISSIMO1922Collins only
STRATOVOLCANO1822All three
SUPERVIRTUOSO1822All three
FORTISSISSIMO1819Collins only
AGGIORNAMENTO1722All three
PIANISSISSIMO1720Collins only
GENERALISSIMO1620All three
ILLUSTRISSIMO1519Collins only

This is a small, specialist set: none of its entries rank among the top 25,000 common English words. The examples range from INCOMMUNICADO and STRATOVOLCANO to musical terms such as STACCATISSIMO. That mix makes the final O a useful clue, but the length and vocabulary make these words tough to summon from memory.

At a glance: a short, specialist set

  • Exactly 10 tournament-listed words have 13 letters and end in O.
  • INCOMMUNICADO is the top scorer in the group.
  • All 10 appear in Collins; five also appear in ENABLE and five in NWL2023.
  • The first letters repeat most often at S, with three words beginning that way.

Which 13-letter words ending in O score most?

INCOMMUNICADO leads the scoring list. Its long run of varied letters makes it stand out from the musical terms, while CONTRAFAGOTTO and STACCATISSIMO also rank near the top.

STRATOVOLCANO and SUPERVIRTUOSO follow closely. The examples are not interchangeable in meaning: a stratovolcano is a volcano type, while a supervirtuoso describes an exceptionally skilled performer.

Several entries share a musical flavor. FORTISSISSIMO and PIANISSISSIMO are expressive terms, so recognizing repeated “-issimo” endings may bring more than one candidate to mind.

How should you use 13-letter words ending in O?

Treat the final O as a filtering clue, not a promise of familiar vocabulary. The set has no common entries by Word Puzzle Answers’s frequency measure, and several words belong to specialist or musical contexts.

Dictionary coverage matters here. Collins includes all 10, while ENABLE and NWL2023 each include five; check your game’s word list before building a play around a less familiar entry.

The neighboring lengths show how unusual this exact fit is: 12-letter words ending in O number 14, while 14-letter words ending in O number three. The count does not rise smoothly with word length.

For 13-letter words ending in O, check the letter count first, then test the endings you recognize. The shared “-issimo” pattern can narrow a search, but it does not identify every candidate; AGGIORNAMENTO and INCOMMUNICADO break that shortcut.

Questions people ask

How many 13-letter words end in O?
There are 10 tournament-listed 13-letter words ending in O. The set includes INCOMMUNICADO, STRATOVOLCANO, and several specialist musical terms. All 10 are listed in Collins, while ENABLE and NWL2023 each include five, so coverage depends on the word list your game uses.
What is the highest-scoring 13-letter word ending in O?
INCOMMUNICADO is the highest-scoring entry among these 13-letter words. CONTRAFAGOTTO and STACCATISSIMO are also near the top. Their unusual letter combinations set them apart from more familiar long words, but always confirm that your game accepts the word.
Are 13-letter words ending in O common?
No; none of the 10 entries falls within Word Puzzle Answers’s common-word frequency group. Many are specialized terms, including musical vocabulary such as FORTISSISSIMO and PIANISSISSIMO. That makes the list more useful for checking a specific pattern than for guessing everyday vocabulary.

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