Yes, "speech" is a common noun because it represents a general class of things, in this case, the act or process of speaking. It is not a specific or particular entity.
The word "word" can be a noun or a verb. As a noun, it refers to a unit of language that carries meaning. As a verb, it means to communicate in speech or writing.
The word "varieties" is a plural noun.
adjective or possibly a noun. adjective use: common man, common area, common bird, common noun in it's somewhat rare noun form, it refers to an area of land or space. also found in the phrase "(something) in common"
"Pomegranate" is a noun, the name of a fruit common in the Mediterranean regions.
Washington can be a proper noun or a common noun. As a proper noun, it refers to the capital city of the United States and the first president. As a common noun, it refers to a surname or could refer to someone from the state of Washington.
Door is a common noun.
Librarian is a common noun.
Noun
Earthquake is a noun.
Tornado is a common noun.
A noun, specifically a proper noun.
It is a common noun.
It is a common noun.
Common noun
common noun
common noun
a common noun