To be of like mind means to share the same thoughts, beliefs or opinion, but there are several synonymous phrases that can be used to convey the same meaning. For instance, 'think alike,' 'have the same viewpoints,' 'agree on a matter,' 'share similar perspectives' are some of the common words used in this case. Other phrases that can be used include 'have a meeting of minds,' 'be on the same wavelength,' 'share a common goal,' 'hold the same view,' 'united in thought' and 'think in the same vein.' These phrases are useful in different contexts, but they all communicate the idea of two or more people or parties being in harmony regarding a particular matter.