The phrase "certain affinity" means there is a specific connection or bond between two things or people. It indicates that there is a strong and unmistakable attraction or similarity between them. Full definition
Depending on the auto insurance provider you select, you may be eligible for discounts based on a good driving record, bundled policies, your employer or belonging to certain affinity groups. (compare.com)
Jensen's dynamic compositions find certain affinities with Dash's wall hung constructions. (pacegallery.com)
Despite this, the works on display do share certain affinities that Wallis and fellow curators Andrew Wilson and Lizzie Carey - Thomas are keen to draw attention to. (studiointernational.com)