The word "botryose" refers to something that is clustered like a bunch of grapes. Therefore, synonyms for "most botryose" could include terms like "most clustered," "most bunchy," and "most grape-like." Other options might be "most compact," "heaviest," or "densest," all of which suggest a similar sense of overlap and tight grouping. Depending on the context, other synonyms might be more appropriate, such as "thickest" or "busiest" in a metaphorical sense, or "roundest" or "plump" in a more physical one. Whatever synonyms one chooses, they should have a sense of density, weight, and clusteredness that reflects the original term.