precocity

noun
UK /prɪˈkɒsəti/
US /prɪˈkɑːsəti/

The quality of being more advanced or mature than is usual for your age.

Her precocity in mathematics amazed her teachers.


OTHER MEANINGS

2. Unusually early development of a physical or mental trait.

The precocity of his language skills surprised everyone.

3. The state of appearing or happening earlier than expected.

The precocity of the spring blossoms hinted at a warm year.

4. Early flowering or ripening in plants.

The precocity of the fruit trees meant an early harvest.