Common words:
* asset
* buffet
* cigarette
* comet
* facet
* inlet
* outlet
* rocket
* socket
Less common words:
* abet (to encourage or assist, especially in wrongdoing)
* abettor (one who encourages or assists in wrongdoing)
* coquet (to flirt)
* coquette (a flirtatious woman)
* crochet (to make fabric by interlocking loops of yarn with a hook)
* filet (a boneless piece of meat or fish)
* gazette (a newspaper or journal)
* inlet (a narrow body of water extending into the land)
* minivet (a small, brightly colored bird)
* palette (a flat surface for mixing paints)
* rivet (a metal pin used to join metal plates)
* valet (a male servant who attends to a man's needs)
Note:
* "et" is usually pronounced like "et" in "pet".
* There are a few words that end in "et" that have a different pronunciation, such as "debt" (pronounced "det").
I hope this helps! Let me know if you'd like to see more words that end in "et".