a good sentence is
some people use diesel in their cars, and some people use petrol.
The truck's engine roared to life with the familiar rumble of a diesel.
I just used genre in a sentence.
You just used it!
You used presiding in a sentence when you asked about it. And u can use any word in a sentence.
the boat is propelled by a diesel engine
It's a descriptive word (an adjective) so it could be used in a sentence thought 'The cat was very bizarre'.
"Gigantic" is not technically a 'proper' word. It could be used in a sentence like "The apple was gigantic", but that is not a formal sentence and could not be used in an essay for example.
Answering this question could be pure haughtiness.
"Her niceness and generosity towards others make her a beloved member of the community."
Your question is itself a sentence which uses the word "could".
When the word fellow is used it could be used like this: Fellow citizens.... , Fellow neighbors... etc.
Example sentence - The road sign gave the mileage to the next three cities.