Stackable words

Atop one another

Stack these four four-letter words, atop one another, to form four columns of four-letter words read top to bottom: APSE, ILEX, ROTE, and SPAS.

Stack these five four-letter words, atop one another, to form four columns of five-letter words read top to bottom: ALTO, BASH, BEAR, ERGS, and STET.

Stack these six four-letter words, atop one another, to form four columns of six-letter words read top to bottom: AVER, CASK, CURB, ILEA, LUTE, and ORTS.

Stack these seven four-letter words, atop one another, to form four columns of seven-letter words read top to bottom: EMUS, ETUI, LINT, ONTO, PURR, RILE, and SAYS.

Stack these eight four-letter words, atop one another, to form four columns of eight-letter words read top to bottom: AUTO, CAMP, CLOP, EATS, IRIS, ODOR, TARO, and VISE.