What's the adjective for agglutinativeness? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs agglutinate and agglutinize which may be used as adjectives within certain contexts.
agglutinate
United with glue or as with glue; cemented together.
(linguistics) Consisting of root words combined but not materially altered as to form or meaning