✅ Join means to attach something closely to something else, usually so the two things are touching (Join the two ends together). Join often implies that the two things joined together can now be treated as one thing (Join the two clauses together into a sentence).
✅ Connect often means to attach something else through a third element like a link, tie, or wire (Connect the batteries). Connect implies that the two things are still distinct, even though they’re attached (Connect the dots).
✅ These implications are often present in metaphorical uses of these words, too. Join can imply two persons have united (The officiant joined them in matrimony), whereas connect implies forming a social or romantic attachment that isn’t quite as close (She connected with a colleague).
Connect these words with more synonyms for join.