Any process that activates or increases the frequency, rate or extent of receptor localization to synapse.
Synonyms:
exact_synonym:
positive regulation of receptor localisation to synapse; up regulation of receptor localisation to synapse; up regulation of receptor localization to synapse; upregulation of receptor localisation to synapse; upregulation of receptor localization to synapse
narrow_synonym:
activation of receptor localisation to synapse; activation of receptor localization to synapse