Build up and Speak for

Build up verb - To become greater in extent, volume, amount, or number.

Speak for and build up are semantically related In some cases you can use "Speak for" instead a verb "Build up".

Speak for verb - To make a request for.

Build up and speak for are semantically related in help topic. Sometimes you can use "Build up" instead a verb "Speak for", if it concerns topics such as support idea or cause publicly.