Answer: Based on your description I am not certain what kind of plant that would be, possibly a thistle of some sort. Here are some photos and descriptions of a variety of thistles.
Here is an illustrated list of weeds commonly found in Ohio. Perhaps you will recognize it from here.
If not, your local county extension should be able to identify it from either a photo of the overall plant and a closeup of the leaf and stem, or a sample freshly cut and enclosed in a clear plastic bag (keep it cool so it stays fresh.)
I hope this helps you identify your weed.
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