7 files declare their use of SynonymInterface in Synonyms 8

AutocompleteService.php in src/SynonymsService/Behavior/AutocompleteService.php

SelectService.php in src/SynonymsService/Behavior/SelectService.php

Synonym.php in src/Entity/Synonym.php

SynonymsBehaviorConfigurableInterface.php in src/SynonymsService/Behavior/SynonymsBehaviorConfigurableInterface.php

SynonymsFormatWordingProviderInterface.php in src/SynonymsProviderInterface/SynonymsFormatWordingProviderInterface.php

SynonymsFormatWordingTrait.php in src/SynonymsProviderInterface/SynonymsFormatWordingTrait.php

synonyms_search.module in synonyms_search/synonyms_search.module

Integrates Synonyms with core Search module.