S: (n) accretion (something contributing to growth or increase) "he scraped away the accretions of paint"; "the central city surrounded by recent accretions"
S: (n) accretion ((geology) an increase in land resulting from alluvial deposits or waterborne sediment)
S: (n) accretion ((law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance))