One possible synonym for "DNA amplifier" is "PCR machine", where PCR stands for "polymerase chain reaction." PCR machines are used to amplify DNA by repeatedly cycling through a heating and cooling process that promotes DNA replication. Another synonym could be "real-time PCR machine", which uses fluorescent dyes to detect the amplification of DNA in real time. "Digital PCR machine" is another relevant synonym which is capable of detecting rare and low-level DNA targets, making it useful in applications such as cancer diagnostics and environmental monitoring. Lastly, "DNA sequencing platform" could be considered a synonym, as sequencing machines like Illumina and PacBio also require DNA amplification as a crucial step.