Terminologies are essential for semantically linking research data across disciplines, ensuring conceptual alignment even with different nomenclatures. Standardised terminologies promote interoperability and data integration, making data understandable and reusable across various sources and fields. Terminologies are used in services and tools for annotating and linking research, necessitating the development of several terminology services (TSs) for publishing, describing, and curating terminologies. Aligning, managing, and developing these TSs is challenging but crucial for consensus building and harmonisation across disciplines. Terminology Services 4 NFDI (TS4NFDI) aims to standardise and harmonise terminology management within NFDI, facilitating consensus and interoperability across disciplines to achieve a shared knowledge representation framework. During the integration phase, we will consolidate the service design of the API Gateway, Service Wrappers, Mapping Service, and reusable GUI widgets. We will extend the coverage of disciplines and integrate additional terminology sources and services to meet the requirements gathered during the initialization phase.