Yes, the noun navigator is a common noun, a word for any one who navigates or any instrument used to navigate.
A proper noun is the name of a person, place, thing, or a title; for example:
Yes
The noun forms of the verb to navigate are navigator, navigation, and the gerund, navigating.
Navigate is a verb.
common noun
Common
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.