The technically correct synonym were in fact Kardankopf, as the suspension is similar to a kardan joint but this term has pushed through for a hung up milling spindle.
Once in a while this term 'one-sided hung up fork head', but this seems pointless as the double-sided mounting has been the the distinctive feature of other heads.
Construction wise fork heads are always more difficult than comparably one-sidedly hung heads. The dynamics is therefore lower. The space requirement is significantly higher, which is why the processing area is limited.