The acronym "s.c." has several synonyms that can be used in different situations. Subcutaneous is one such word, which is commonly used in medical terminology to refer to an injection given just beneath the skin. Another synonym for s.c. is "under the skin," which can be used in a non-medical context as well. The term "subdermal" is also related, referring to an injection given under the dermis layer of the skin. Other similar terms include "intradermal" and "transdermal," which both relate to injections or medications given through or across the skin. Overall, having a variety of synonyms for a term like s.c. can help to make communication more clear and accurate.