There is no adjective in the sentence "The lion growled loudly." Loudly is an adverb modifying the verb growled.
Lion, cage, zookeeper
The term Asiatic lion is made up of the proper adjective 'Asiatic' and the common noun 'lion'.
Marathi sentence about lion
The lion's den was empty. (The den belongs to a lion.)
In a diagram that shows a lion and a deer, the lion is the predator and the deer is the prey.
Lion, cage, zookeeper
Loudly
The lion let out a deep growl as a warning to intruders.
The lion bellowed loudly to intimidate its rivals.
The male lion roared loudly to establish his dominance over the pride.
The male lion roared loudly to mark his territory.
The adjective is leonine.
The word quickly is an adverb.An example sentence is: "he quickly withdrew his arm before the lion could bite it off".
The Lion is in its cage
The term Asiatic lion is made up of the proper adjective 'Asiatic' and the common noun 'lion'.
We went to the zoo and saw a Lion in a cage.
He was going to roar loudly