When seeking out words that have similar meanings to "confine to," it is useful to consider alternatives such as restrain, limit, restrict, or bound. Each of these words carries a similar connotation to confine and implies a sense of constraint or restriction. Similarly, terms such as box in, hem in, or encircle also convey the idea of being enclosed or confined. Other synonyms for this phrase might include converge, focus, center, or channel, all of which suggest concentration or a narrowing down of options. Ultimately, selecting the most appropriate synonym will depend largely on the intended context and the desired tone of the message being conveyed.