Sashay and sachet are easily confused words.
The spell-check application of most word processing software programs would not catch a slip-up of these two words. Spell-check is looking for words that aren’t in its dictionary, and words that resemble words in its dictionary but are possibly spelled wrong. Spell-check isn’t perfect. It doesn’t know and can’t guess what word you wanted or what word you meant, it can only judge the words on the page. If you used words that are all spelled correctly, it gives you a pass anyway.
Autocorrect suggests words that start with the same letters. It’s suggesting what word you may want to save time, but quite often, its suggestions are pretty off base. They don’t help you out, but they do make you laugh.
Sashay is a verb. It means to walk gracefully and with ease.
Sachet is a noun. It means a small pillow or bag with potpurri, dried flowers, scented soap blocks, or perfumed powder. The bag is placed in an lingerie drawer or other enclosed space to make the contents smell better.
The following story uses both words correctly:
Sasha started selling handmade sachets, scrubs and soaps in high school. When she decided to extend her business beyond her schoolmates and their parents, she realized she needed a loan. She sashayed into the bank with her business plan, confident she would get accepted. She was right.