Dismissal is a noun.
Adjective: The girl is very dismissive. The girl is very tall. Both can be used the same way because they are both adjectives.
She was dismissive of trying new things.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.