"On skid" can be used to describe a state of losing control or slipping on a slippery surface. Some synonyms that can be used instead of "on skid" include "skidding," "slipping," "sliding," "losing traction," and "losing grip." Each of these synonyms conveys the same idea of struggling to maintain balance on a slick surface. It's common to use these words in winter when walking or driving on icy roads or sidewalks. Synonyms help add variety to writing and allow writers to express their thoughts more creatively. Any of these words can be used in place of "on skid" to keep writing fresh and lively.