Yes, the word lifetime is a common noun, singular, abstract noun; a word for any lifetime of anyone or anything.
A proper noun is the name of a specific person, place, thing, or title; for example:
The word lifetime is a noun. The plural is lifetimes.
Common
Common noun
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
No, "lifetime" is not a preposition. It is a noun that refers to the duration of a person's life or existence.
a noun
The word lifetime is a noun. The plural is lifetimes.
common noun
Common
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Yes, it is a noun. It refers to a period of time, as do lifespan and longevity.
Most definitely a common noun.
Camel is a common noun.