ACCRETION

a gradual build-up or enlargement

an increase by natural growth or addition

something contributing to growth or increase

SYN - Accumulation

"Over the next few weeks his wife would notice quite fondly the accretion of her husbands arms due to the weight set she had gotten him for his birthday."

"'You have gone through a most incredible accretion my young fellow,' the old man said to the young growing boy at the end of their two years together at the academy."

"there was an accretion of leaves on the side of the rock the wind was blowing against."

"pillow after pillow where being brough and added to the pile, this accretion made the prospect of jumping off the house much more promising."