The term 'make stronger' can be expressed in a variety of ways. INTENSIFY (9 letters) means to increase the strength or intensity of something. BUTTRESS (8 letters) is to support or REINFORCE something structurally. STRENGTHEN (10 letters) is to make something stronger or more powerful. REINFORCE (9 letters) is to STRENGTHEN or support something with additional resources. BRACE (5 letters) is to prepare for something by making oneself strong and resilient. ACCENT (6 letters) is to emphasize or highlight something. EMPOWER (7 letters) is to give someone the authority or ability to do something. All of these words are related to the idea of making something stronger.