When you want to describe someone who is being playfully romantic, there are several synonyms to use instead of the word "flirty". Some of the great choices might include charming, flirtatious, coquettish, sweet-talking, seductive, suggestive, alluring, teasing, playful, and coy. Each of these words captures different facets of the behavior, with some leaning toward gentle suggestive remarks, while others suggest overt sexual tension. But whether you're talking about someone who is coquettish and subtle, or someone who is alluring and bold, there are plenty of synonyms to choose from. Experiment with different styles to find the perfect way to describe your playful side.