The Synonyms module enriches Entities with the notion of synonyms. Currently the module provides the following functionality:
Support of synonyms through attached fields. Any field, for which synonyms behavior implementation exists, can be enabled as source of synonyms.
Support of synonyms through base fields (2.0.x) or Entity properties (7.x). Base fields stored in database (as opposed to being calculated on-the-fly) can be enabled as source of synonyms.
Synonyms-friendly autocomplete and select widgets for entity reference field type.
Integration with Views. Synonyms module provides a view filter and contextual filter validator that allow filtering not only by entity name but also by one of its synonyms.