There are many words that can be used as synonyms for "favourite pursuit." Some of these may include "beloved pastime," "cherished hobby," "preferred activity," "treasured interest," "top recreation," or "favorite avocation." Depending on the context in which the phrase is being used, other possible synonyms may include "preferred pursuit," "most loved endeavor," "favored passion," or "top leisure pursuit." Ultimately, the best synonym for "favourite pursuit" will depend on the specific meaning and tone desired by the writer, as well as any unique contextual factors that may be at play in their writing.