Conversation is a noun.
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.
Conversation is a noun.
Colloquial is an adjective--colloquial language.
Speech, conversation.
The word talk can be a noun or a verb. The noun form is a conversation or a lecture. The verb form means to communicate through means of speech.
The part of speech that the word my is used as is an adjective.
The part of speech for this particular word is a noun.
The part of speech for the word civilian is English grammar.
The word "diplomacy" is a noun, meaning the practice or skill of managing international relations, negotiations, and peaceful communication between countries or people.
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 "boulevard" is a noun.
The word speech is a noun.
"um" is not a word. It is called a "filler", used in conversation to fill time.