13-letter words ending in A

The A ending is unusually selective at this length: just 113 entries, compared with 7,018 13-letter words ending in S. Many examples are technical compounds or disease names, and only one entry meets the common-word frequency threshold. Dictionary coverage also varies: 108 appear in Collins, compared with 56 in NWL2023 and 38 in ENABLE.

13-letter words ending in A at a glance

• The exact ending filter returns 113 words, and every match ends in A.
• Collins includes 108 entries, NWL2023 includes 56, and ENABLE includes 38; source counts overlap.
• SCHIZOPHRENIA and ESCHSCHOLTZIA tie for the top tile score at 32 points.
• P leads the first-letter tally with 16 words; A and S each begin 14.
• Only one entry meets the common-word frequency threshold.

Which A-ending words score the most?

SCHIZOPHRENIA and ESCHSCHOLTZIA share the top score, with 32 points apiece. XANTHOCHROMIA, XEROPHTHALMIA, and HYPERPROSEXIA follow at 30, so a rare letter can matter more than the word’s length. Across the full set, the average score is 22.4 points.

HYPERGLYCEMIA and HYPOGLYCAEMIA each score 29, while POLYCYTHAEMIA and PHYSHARMONICA reach 28. For a rack-building clue, compare the internal letters rather than treating the final A as a scoring advantage: every match shares that ending, but the high scorers contain more valuable tiles.

What patterns stand out in this A-ending group?

The first letters are less concentrated than the ending: P starts 16 entries, while A and S start 14 each and H starts 13. Examples range from PARAPHERNALIA and PARAINFLUENZA to SCHIZOPHRENIA and SYRINGOMYELIA, with medical and scientific vocabulary prominent.

The 113 matches are a small group beside endings such as S, which has 7,018 13-letter words, or Y, which has 1,563. This makes the ending a sharp filter, but not a shortcut to familiar vocabulary: just one match is common by frequency. Check your game's word list, since the dictionary counts differ.