The phrase "royal yard" is a noun. The plural is royal yards.
"Wildly" is an adverb . . . it modifies a verb (action word). "He was running around the yard wildly". 'Wildy' modifies the verb, 'running'.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is beneath
The part of speech for "answer" is a noun.
Yes, the yard is a part and yes, you can get charged.
The part of speech for "explicit" is an adjective.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.