There is no word 'drcube' in the English language. Perhaps you meant Dr. Cube, which is a proper noun, the name of someone or something specific and should be capitalized.
Dr. Cube is a Proper noun. Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things. If a common noun is part of a name, it becomes a proper noun. Pronouns always replace proper and common nouns.
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Camel is a common noun.
Th word tail is a common noun because the first letter of a proper noun is capitalized.
it is re@lly @ common noun
common
The noun cassette is a common noun.
Yes, it is a common noun, not a proper noun.