A proprietor is a holder of property.
We reported the rude sales clerk to the proprietor.
This person is sole proprietor of the building.
The customer requested to see the proprietor so he could make his complaint.
You are speaking to the proud proprietor of the ghost town's newest apothecary shop!
In response to my complaint, the proprietor of the shop gave me a discount coupon for my next purchase.
I am not writing a sentence using that word.
The bar was opened each day by its proprietor.
I can give you a sentence using the word galaxy.
a sentence using the word endotracheal
This is a sentence using the word aviator.
Mr. Randall was a locksmith, and Mrs. Randall was the proprietress of The Red Dragon, the only motel in town.
I am saying a sentence using the word collagen.
This is a sentence using the word monomer. :P