Start can either be used as a noun or a verb:
Noun:
The start of the race will be at the tree.
The horses are lined up for the start of the race.
He looked up with a start when he heard the gun go off.
Verb:
The race will start at 9 AM.
Gentlemen, start your engines.
Start the countdown.
The word starting is a verb. It is the present participle of the verb to start.
The part of speech that the word my is used as is an adjective.
A suffix changes a word's part of speech. For example, the word 'happy' is an adjective. But when you add a suffix, which is an ending, it can change the part of speech. Happily is an adverb. Happiness is a noun.
for
it depends what word it is it could be any part of speech depending on the sentence
The word power is a noun. The plural form is powers.
The starting word of a speech is the introduction. Many people begin their speech with a greeting to the audience and distinguished guests.
The part of speech for this particular word is a noun.
The part of speech that the word my is used as is an adjective.
H is a letter, not a word. To be a part of speech, it needs to be a word.
The part of speech for the word civilian is English grammar.
The part of speech for the word diplomacy is a noun.
The word speech is a noun.
The part of speech for this particular word is a noun.
The word speech is a noun.
The word speech is a noun.
The word speech is a noun.
What "part of speech" is the word "said?"