accruement
/əˈkruːm(ə)nt/(also accrument)
noun
1Something that accrues or has accrued; an addition or accession by natural growth; an increment. Also (occasionally): an accumulation.
2The action or process of accruing by growth; accumulation, build-up.
Origin
Early 17th century; earliest use found in Thomas Walkington (c1575–1621), Church of England clergyman and author. From accrue + -ment.