A "mountain dweller" is someone who resides in a remote area with hilly or mountainous terrain. Synonyms for this term include "hillbilly," "mountain folk," "mountain inhabitant," and "hill people." Another similar term is "highlander," which is used to describe those who inhabit high-altitude regions. Alternatively, "upland dweller" and "up-mountain resident" are synonymous with the term. "Rustic" is another word that can be used to describe someone who lives in a rural, mountainous setting. Additionally, "backwoodsman" and "mountain man" are both strong descriptors for someone who can thrive in remote mountainous regions. Overall, there are many synonyms available to describe someone who is a "mountain dweller".