Short words:
* bat/batt (a piece of wood used in baseball)
* bet/bett (to gamble)
* fin/finn (a fish's fin)
* kit/kitt (a small set of tools)
* mad/madd (angry)
* pal/pall (a close friend)
* rip/ripp (to tear)
* run/renn (to move quickly on foot)
* sin/synn (an immoral act)
* tan/tann (a light brown color)
Longer words:
* defer/deferr (to postpone)
* infer/infern (to conclude from evidence)
* offer/offerr (to propose)
* refer/referr (to direct to someone or something else)
* transfer/transfrr (to move from one place to another)
Note: While the doubling of the consonant in these examples changes the meaning of the words, it's important to remember that these are not officially recognized words in the English language. They're more like humorous or playful variations.