"Come to collect" is a phrase that is often used to suggest someone is going to pick something up or retrieve it. However, there are many ways to rephrase this statement using synonyms. Instead of "come to collect," you could say "retrieve," "pick up," "gather," "fetch," "take back," "obtain," or "recover." Depending on the context, these synonyms give you the opportunity to express yourself differently and add some variety in your language. For example, you could say, "I'm here to retrieve my package," instead of "I have come to collect my package." Using synonyms helps diversify your language and makes it more interesting to your audience.