ichidan verb, transitive verb
build up; complete; construct; create; put together
Focuses on the process of making something tangible or intangible through effort, often implying completion. Used for physical objects, systems, stories, etc.
彼はたった一人でその家を作り上げた。
He built that house all by himself.
We built a new system as a team.
ichidan verb, transitive verb
make up; fabricate; invent; cook up
Used for creating something false or fictional, such as a story, excuse, or lie. Often has a negative connotation.
彼は言い訳を作り上げた。
He made up an excuse.
その話は全部作り上げたものだ。
That story is completely fabricated.