Adjective
The word "lavender" can be a noun, referring to the plant or its fragrant flowers, or an adjective, describing something as having a color or scent resembling lavender.
No one can audition for the part of Lavender Brown because the film has already come out.
The flowers of the lavender plant are used to make tea.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.