childhood

In by extension|lang=en terms the difference between childhood and year

is that childhood is (by extension) the early stages of development of something while year is (by extension) the time it takes for any planetary body to make one revolution around another body.

As nouns the difference between childhood and year

is that childhood is (uncountable) the state of being a child while year is the time it takes the earth to complete one revolution of the sun (between 36524 and 36526 days depending on the point of reference).

As a noun childhood

is (uncountable) the state of being a child.

As an adjective juvenile is

youthful; young.

As a noun childhood

is (uncountable) the state of being a child.

As a proper noun young is

for the younger of two people having the same given name.

As a noun childhood

is (uncountable) the state of being a child.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun childhood

is (uncountable) the state of being a child.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between childhood and teenage

is that childhood is (uncountable) the state of being a child while teenage is brushwood for fences and hedges.

As an adjective teenage is

of or relating to an age between thirteen and nineteen years old.

As nouns the difference between childhood and juvenescence

is that childhood is (uncountable) the state of being a child while juvenescence is the state of becoming young or juvenile.

As nouns the difference between childhood and parenthood

is that childhood is (uncountable) the state of being a child while parenthood is the state of being a parent.

As nouns the difference between childhood and childcare

is that childhood is (uncountable) the state of being a child while childcare is the act, practice, or occupation of supervising and taking care of young children.