When describing a direction, the word "southwestwards" can be replaced with several different synonyms. Some alternatives include "southwesterly", "southwestward", "southwest", "south by west", and "southwestwardly". Each of these words conveys the same general meaning of moving or pointing towards the southwest, but may be used in slightly different contexts. "Southwestward" and "southwestwardly" are often used when referring to movement or motion, while "southwest" and "south by west" are commonly used to refer to a specific location or direction. Ultimately, the choice of synonym will depend on the specific context and language style of the writer or speaker.