The difference between Grow and Increase

When used as verbs, grow means to become bigger, whereas increase means (of a quantity, etc.) to become larger or greater.

Increase is also noun with the meaning: an amount by which a quantity is increased.

check bellow for the other definitions of Grow and Increase

Grow as a verb (ergative):

To become bigger.

Examples:

"Children grow quickly."
Grow as a verb (intransitive):

To appear or sprout.

Examples:

"Flowers grew on the trees as summer approached."

"A long tail began to grow from his backside."
Grow as a verb (transitive):

To cause or allow something to become bigger, especially to cultivate plants.

Examples:

"He grows peppers and squash each summer in his garden."

"Have you ever grown your hair before?"
Grow as a verb (copulative):

To assume a condition or quality over time.

Examples:

"The boy grew wise as he matured."

"The town grew smaller and smaller in the distance as we travelled."

"You have grown strong."
Grow as a verb (intransitive, obsolete):

To become attached or fixed; to adhere.

Increase as a verb (intransitive):

(of a quantity, etc.) To become larger or greater.

Examples:

"His rage only increased when I told him of the lost money."
Increase as a verb (transitive):

To make (a quantity, etc.) larger.
Increase as a verb:

To multiply by the production of young; to be fertile, fruitful, or prolific.
Increase as a verb (astronomy, intransitive):

To become more nearly full; to show more of the surface; to wax.

Examples:

"The Moon increases."

Increase as a noun:

An amount by which a quantity is increased.
Increase as a noun:

For a quantity, the act or process of becoming larger
Increase as a noun (knitting):

The creation of one or more new stitches; see .