The phrase "call for" is a common expression used to describe a demand or request for something. However, there are various synonyms for this phrase that can be used to convey a similar meaning. Some of these synonyms include "request," "entreat," "plead," and "appeal for." Other synonyms that can be used interchangeably with "call for" include "require," "necessitate," and "mandate." Each of these phrases can be used in different contexts and can help to add variety and nuance to one's writing. Using a variety of synonyms for "call for" can also help to prevent redundancy and make a piece of writing more interesting and engaging.