When it comes to fortifying oneself or one's interests, there are several synonyms that encompass what could be considered as defensive measures. Words like safeguard, protection, security, shield, and precaution are often used to connote the idea of making oneself or something else less vulnerable to harm. The term defense strategy is also sometimes used to describe the actions one takes to secure their position, whether it is in a physical, digital, or strategic sense. Other possible synonyms include barrier, buffer, fortification, and resistance all of which suggest some degree of fortitude and resilience in the face of potential threats. Ultimately, the choice of synonyms depends on the specific context in which they are used.