"Come on to" is a phrase used to describe when someone is making a suggestive or romantic advance towards another person. Some synonyms for this phrase could include "flirt with", "hit on", "make a move on", "woo", "court", or "seduce". These words are often used to describe situations where one person is showing interest in another person, typically in a romantic or sexual way. It is important to note that while these words may differ slightly in their connotations, they all essentially describe the act of trying to initiate a romantic or sexual relationship with someone else.