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15-letter words starting with Y

15-letter words starting with Y total two: yellowishnesses and yieldablenesses, both listed in Collins and both ending in S.

2 wordsTop pick YELLOWISHNESSESHighest score YELLOWISHNESSES 24

P starts the most 15-letter words (695); Y starts the fewest (2). Y ranks #26 of 26. The bar under each letter shows the size of its list.

Best words to play first 2 · most-used first

  • YELLOWISHNESSES24
  • YIELDABLENESSES21
All valid words 2

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

  • YELLOWISHNESSES24
  • YIELDABLENESSES21

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses
WordScrabbleWords With FriendsDictionaries
YELLOWISHNESSES2425Collins only
YIELDABLENESSES2124Collins only

Y is a strikingly sparse opener at this length: these two entries are the entire list. Both are long plural forms built around the suffix -nesses, and neither is a familiar everyday word. That makes them more useful as specialist word-game candidates than as words to reach for in ordinary conversation.

At a glance: the two Y starters

  • Two 15-letter words begin with Y: yellowishnesses and yieldablenesses.
  • Both entries appear in Collins; neither appears in ENABLE or NWL2023.
  • Yellowishnesses scores 24, while yieldablenesses scores 21.
  • Both words end in S, a shared feature of this short list.

Why are there only two 15-letter words starting with Y?

The count drops sharply at the long end of the Y lists: 14-letter words starting with Y number six, while this 15-letter group has two. At the same length, P leads with 695 entries, so Y is a particularly narrow starting-letter choice.

The pair also has a clear shape. Yellowishnesses builds on yellowishness, and yieldablenesses on yieldableness; each takes the plural ending -es after -ness. That shared construction explains both their length and their final S without requiring a rare starting-letter sequence.

What makes 15-letter words starting with Y stand out?

Yellowishnesses is the stronger scorer at 24 points, three more than yieldablenesses at 21. The pair averages 22.5 points, but the best choice depends on the letters already on your rack and the board squares available. A high printed score is not a promise of a playable move.

The useful distinction is dictionary coverage: both entries are Collins words, but neither is included in ENABLE or NWL2023. Check your game's word list before building a play around either one. Their specialist status is the main limitation; knowing the spellings does not make them legal in every word game.

For a broader pool, compare the 14-letter Y list or browse all 15-letter words. The 15-letter W and Z lists offer nearby alternatives when your opening letter is flexible.

Questions people ask

How many 15-letter words start with Y?
There are two: yellowishnesses and yieldablenesses. Both are listed in Collins, both end in S, and neither is included in ENABLE or NWL2023. Their unusual length comes from extended forms built around the suffix -nesses.
Which 15-letter Y word scores more?
Yellowishnesses scores 24 points, three more than yieldablenesses at 21. The higher score makes it the top scorer of this pair, though board placement and the letters you can actually play still determine the value of a move.
Are yellowishnesses and yieldablenesses valid in every word game?
No. Both words appear in Collins, but neither appears in ENABLE or NWL2023. A word accepted in one dictionary may be rejected in another, so check the word list used by your particular game before playing either one.

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