"BULL PRIMARY TUNGSTEN ASSOC" does not appear to be a common phrase or word that has commonly used synonyms. It appears to be a unique combination of terms that might not have direct substitutes. The phrase could potentially refer to a company or an organization related to bull primary tungsten, which is a type of tungsten ore. However, without further context or information, it is difficult to provide accurate synonyms for this specific phrase. It is recommended to provide more context or clarify the abbreviation to obtain more relevant information and potential synonyms.