Five-letter Wordle has a relatively compact answer space. Most players develop a reliable two or three-guess opener routine that quickly narrows the field. At seven letters, that routine stops working as cleanly because the answer pool is far larger and common openers cover a smaller proportion of likely letters in longer words.
Seven-letter words also tend to carry more prefixes and suffixes. Guessing a word with a common ending like -tion or -ing can confirm three or four letters at once, but it also means the meaningful variation is concentrated in the middle of the word, where it is hardest to isolate. Learning to read the board from the inside out, rather than anchoring to the first or last letter, is the main skill shift between five-letter and seven-letter play.

