The word "shankbone" refers to the bone that is found in the lower part of a leg. The term can be replaced by various synonyms depending on the context and usage of the word. Some of the popular synonyms for "shankbone" include "tibia," "fibula," "lower leg bone," "leg bone," "calf bone," "foot bone," and "ankle bone." These alternative words can be used interchangeably in sentences, depending on which one accurately conveys the intended meaning. It's essential to use synonyms when writing to avoid repetition and add a layer of interest to your composition.