In Wordle Hard Mode, the 5 best starting words are SCOWL, BLIMP, BICEP, SPLIT, SCAMP. With any of these, you can solve any puzzle in only 5 guesses, only using common words as guesses.
https://www.reddit.com/r/wordlegame/comments/sac609/the_5_best_starting_words_for_hard_mode_scowl/