The more common synonym is oxycephalic, but that's not as vivid. While acrocephalism is a real medical condition (caused by premature closure of the skull sutures as an infant), it is also useful as a synonym to avoid constantly referring to pointy-headed intellectuals. From Greek roots akros, highest/on the extremity + kephalikos, pertaining to the head. (Note that oxycephalic is not coined from Greek roots but rather adopted directly from oxyképhalos, sharp-headed.)
Technically acrocephalic doesn't describe a pointy-haired boss -- but if you have one, he or she is unlikely to notice the solecism.