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if you look at the origin of thise effects/names, yes.
A chorus effect - like the name implies - happens when more than one performer plays the same phrase at the same time, subtle shifts in timing and pitch between the two (or more) create a lush sound.
Vibrato is achieved by periodically changing the pitch and returning to the original pitch.
The electronic versions of these effects however are created the same way:
If you take a chorus stompbox (a real one) you can disable the dry signal by cutting the right wire/component or inserting a switch in the right place and you now have a vibrato unit.
A chorus can have more than one voice, making it more complex than a vibrato, but the same principles apply.
Yes, I'm aware that those two effects have similarities, and chorus is a delayed vibrato mixed with the dry sound, as I mentioned in one of my earlier post. Still they are considered as different effects, they sound different (at least in most cases), they have different names and they are found as separate effects in fx processors.