伸びる

to stretch; to extend; to lengthen; to grow (of hair, height, grass, etc.)

to straighten out; to be flattened; to become smooth

to spread (of paint, cream, etc.)

to stretch out (e.g. of a hand); to extend

to lose elasticity; to become slack; to become soggy (e.g. of noodles)

伸びる only

to make progress; to develop; to expand; to increase; to improve

伸びる only

to be exhausted; to get groggy; to be stunned (by a blow); to pass out; to collapse

延びる only

to be prolonged (of a meeting, life span, etc.); to be extended (e.g. of a deadline); to lengthen (e.g. of the days)

延びる only

to be postponed; to be delayed; to be put off