Hi, I really don't know, I thought at first that they were words, however when I entered the page that the contest promoter posted, I checked and apparently they are not words but syllables.
Then I checked on the Writers' Workshop platform, and indeed they are syllables and not words.
You can visit the page I am referring to in this link:
https://www.tallerdeescritores.com/ejemplos-de-haiku
Thank you very much, for the comment.
Not in English, but I think I got what you mean... So Haiku is about Syllables and not necessarily complete words.
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