The noun harbor is a singular, common, concrete noun; a word a place on a coast where vessels may find shelter, often having docks, piers, and other structure to accommodate vessels. A noun is used in a sentence as the subject of a sentence or a clause, and as the object of a verb or a preposition. Example:
A port is often built in a harbor, but every harbor does not have a port.
The ship arrived in the harbour after a month tour in the sea.
The word "mainstay" is a noun. An example of a sentence containing the word would be: Tourism is the mainstay of this small harbor town.
I parked my boat at a harbor
A harbor is for docking ships.
In the early morning, the ship pulled into the harbor.
how can you use the word content in noun and verb in a sentence
Yes you can it is a noun and a verb depending on how you use it
its a noun
As a noun.
The cracks in the wall were expanding, indicating a structural problem.
One way to use "color" as a noun in a sentence is: "The artist used a vibrant palette of colors in the painting."
It can be used as a noun (during the storm the ships stayed in the harbor) and also as a verb (it is illegal to harbor a criminal).