Rhizoidal is an adjective meaning "related to or resembling a rhizome" which is a type of stem that grows underground and sprouts roots and shoots. Some synonyms for rhizoidal include creeping, crawling, rooting, tuberous, underground, subterranean, and rooting. These words all relate to the underground growth patterns and structures characteristic of rhizomes. Additionally, words like interconnected, spreading, and branching can also be used to describe this type of growth pattern, as rhizomes often send out roots and shoots in multiple directions. These synonyms can be useful for writers and speakers looking for alternative ways to describe the root or rhizome-like characteristics of a particular organism or structure.