An acorn producer is an organism that produces acorns, which are the fruit of the OAK tree. The crossword solutions for this term are OAK (3 letters), OAKS (4 letters), SEED (4 letters), NUT (3 letters), and OAKTREE (7 letters). OAK and OAKS refer to the OAK tree, which is the source of acorns. SEED and NUT refer to the acorns themselves, which are a type of SEED and NUT. OAKTREE is a more specific term for the OAK tree, which is the producer of acorns.