"Play into" is a phrasal verb that means to support or encourage a certain behavior or outcome. There are several synonyms for this phrase, including feed into, bolster, reinforce, enhance, foster, and promote. Each of these synonyms indicates a certain level of support and encouragement, with feed into and bolster being more passive and reinforce and promote being more active. The word enhance suggests a stronger emphasis on improving or making something better, while foster implies nurturing and support over time. Overall, each of these synonyms can be used interchangeably with "play into" depending on the specific context and desired meaning.