Amoebalike is an adjective used to describe something resembling an amoeba, which is a type of single-celled organism. Antonyms for amoebalike could include structured, organized, and rigid. A structured object or concept is one that is organized and follows a set pattern or framework, unlike an amoebalike entity that lacks any defined structure. Organized denotes something arranged systematically, with a clear purpose and order. Rigid means something that is inflexible and unyielding, in contrast to the ever-changing shape of an amoeba. Furthermore, terms like patterned, symmetrical, and consistent could also function as antonyms of amoebalike.