Vaccinal is a word that relates to vaccines or pertaining to vaccination. Some synonyms for vaccinal include immunizing, preventative, prophylactic, and inoculative. Depending on the context, other potential synonyms could include protective, preventive, or therapeutic. It is important to select the appropriate synonym based on the intended usage and the degree of specificity required. For example, if discussing a vaccine's ability to prevent a particular disease, terms like preventative and prophylactic may be more appropriate. In contrast, if discussing the overall impact of vaccines on public health, broader terms like immunizing or inoculative may be more appropriate.