It is mainly a noun, but can be used as an adjective.
Autumn is a beautiful time of year -- noun.
I love autumn leaves -- adjective.
It is capitalized at the beginning of the sentence or when it forms part of the proper noun. Examples: Autumn in my Heart The Autumn (by Elizabeth Barrett Browning)
adverb
what part of speech is work
i want to know what part of speech is camping
what part of speech is beneath
The Autumn Store Part One was created in 1990-01.
The Autumn Store Part Two was created in 1990-01.
Turned is a verb.
The figure of speech in "Autumn Fires" by Robert Louis Stevenson is personification. Personification is used when the poem describes the autumn leaves as "a blowing like flames of gold." This gives human-like qualities to the leaves by suggesting that they are alive and moving like flames.
It is capitalized at the beginning of the sentence or when it forms part of the proper noun. Examples: Autumn in my Heart The Autumn (by Elizabeth Barrett Browning)
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.