Batholitic is a term used in geology to describe a type of igneous rock that solidifies deep beneath the Earth's crust. Synonyms for batholitic include plutonic, intrusive, and deep-seated. Plutonic refers to any igneous rock that forms deep within the Earth, while intrusive refers to any type of rock that penetrates existing rock formations. Deep-seated is a more general term used to describe any geological feature that originates from within the Earth's interior. Other words that may be used as synonyms for batholitic could include subterranean, abyssal, or abyssopelagic, alluding to the deep and inaccessible locations where these rocks are formed.