Consider the quote from "What is a Grantor Trust" article.
This trust is revocable, which simply means it can be altered, modified, and otherwise changed or even terminated during the life of the grantor, provided that the grantor has full mental capacity.
As far as I could figure out from other forums words "alter" and "modified" mean "to change slightly", and "change" is more generic word and may also mean "replace" or "exchange for something else". The text in bold sounds to me like "it can be slightly changed, slightly changed, and otherwise changed". Are there some differences in meaning between "alter" and "modify" in this context or in general? Are they generally interchangeable?