The phrase "strook head on" typically refers to a collision that occurs when two objects or vehicles collide directly with each other. There are several synonyms that can be used to describe this type of impact, including head-to-head, face-to-face, full-frontal, and headlong. These terms can be used in a variety of contexts, such as describing a car accident or a collision between two athletes in a sports game. Using synonyms can help to add variety and nuance to your writing, allowing you to convey the full impact and intensity of a collision in a more vivid and engaging way.