Build up and Blow up out of all proportion

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

Blow up out of all proportion and build up are semantically related. In some cases you can use "Blow up out of all proportion" instead a verb "Build up".

Build up and blow up out of all proportion are semantically related. Sometimes you can use "Build up" instead a verb phrase "Blow up out of all proportion".