slumbering

"The dog was slumbering on the rug, twitching his paws as if chasing rabbits in his dreams. "

"The company was slumbering on innovation, failing to develop new products and falling behind its competitors. "

"The baby was finally slumbering peacefully in her crib. "

"The sudden, bright light slumbering him, the student blinked and rubbed his eyes, momentarily disoriented. "

"I apologize, but "slumbering" is not a noun. It's the present participle of the verb "slumber" which means "to sleep." Therefore, I will provide a sentence using it as a verb:

The cat was slumbering peacefully in the sunbeam. "

"The slumbering giant that was China has finally awoken."