Common Words:
* Afterson: The time after noon.
* Goodson: A person's surname, often a patronymic (meaning "son of").
* Jackson: A common surname.
* Johnson: A common surname.
* Madson: A surname, often a variant of "Madsen."
* Nelson: A common surname.
* Peterson: A common surname.
* Robertson: A common surname.
* Thompson: A common surname.
* Watson: A common surname.
* Wilson: A common surname.
Less Common Words:
* Backson: A person who works behind the scenes.
* Bedsom: A place where beds are made or sold.
* Blossom: A flower.
* Clownsom: A clown's costume.
* Darkson: A person who is always gloomy.
* Eagelson: A person who is very sharp and observant.
* Fathersom: A person's father. (This is a bit of a made-up word, but it fits the pattern.)
* Gleeson: A surname.
* Hardsom: A person who is difficult to deal with.
* Insom: A person who is unable to sleep.
* Jakeson: A person who is a joker.
* Kensom: A person who is very knowledgeable.
* Lightsom: A person who is cheerful and optimistic.
* Markson: A person who is very lucky.
* Nuisom: A person who is annoying.
* Offsom: A person who is rude and disrespectful.
* Parsom: A person who is very religious.
* Quarkson: A person who is very strange and eccentric.
* Reasonsom: A person who is logical and rational.
* Sunsom: A person who is very warm and friendly.
* Telesom: A person who is able to see far into the future.
* Uptonsom: A person who is very wealthy.
* Visionsom: A person who has a vivid imagination.
* Warsom: A person who is very brave and courageous.
* Xenosom: A person who is a foreigner.
* Yardsom: A person who is very skilled in a particular area.
* Zonsom: A person who is very secretive.
Please note that many of these words are uncommon or made-up for this exercise. While they follow the pattern of ending in "son," they may not be real words or have widespread usage.