BIP39 Words Starting with Y (6 words)

The 6 BIP39 words that start with Y run from #2039 yard to #2044 youth in the English wordlist: indexes 2038 to 2043, or 11111110110 to 11111111011 in binary, so all of them begin with the bits 1111111. That is 0.3% of the 2048 words, the 24th-largest of the 25 letter groups. In list order they are yard, year, yellow, you, young and youth, from 3 to 6 letters long.

One three-letter beginning is shared by two or more words: "you" begins you, young and youth. The 3 words in these groups need their first four letters to be told apart, while 2 are identified by the first three, and one (yard) by the first two. The short word you also begins longer ones (you: young and youth), so a four-letter backup keeps it whole.

Three of the 6 words have look-alikes one letter away: yard (card and hard), year (near, pear and wear) and youth (south). Read aloud, 14 pairs differ by a single sound, for example year /jɪə/ and you /juː/ or deer /dɪə/. Two of the words appear in the official BIP39 test vectors: year (vectors #2, #6 and #10) and yellow (vector #2).