"Put into effect" is a commonly used phrase to indicate the act of implementing or enforcing something. However, there are several other synonyms that can be used to communicate a similar meaning. For instance, "enact," "implement," "execute," "enforce," "apply," "put in place," "carry out," "establish," and "put into action" are all potential alternatives. Depending on the context and tone of the sentence, any of these words can be effective at conveying the idea of putting a plan or idea into practice. Using synonyms can help avoid repetition and add variety to one's writing or speech.