These are some nouns which are similar to one another, we may learn about them, in order to distinguish. <br/><br/><span style="color:#ff6600;">burglar robber shoplifter pickpocket mugger thief </span><br/><br/><br/><span style="color:#000000;">A burglar is someone who breaks in and steals from a private home.</span><br/><br/><span style="color:#000000;">A robber is someone who breaks in and steals from, e.g., a bank or business.</span><br/><br/><span style="color:#000000;">A shoplifter is someone who steals something when he/she is in a store.</span><br/><br/><span style="color:#000000;">A pickpocket is someone who steals from you on the street, often without you noticing.</span><br/><br/><span style="color:#000000;">A mugger is someone who uses violence to steal from you on the street.</span><br/><br/><span style="color:#000000;">A thief is the general word for some who steals.</span><br/><br/><span style="color:#000000;">All of them are related to <i>steal</i>, though the ways they work are different.</span><br/><br/><span style="color:#339966;"><i> from American English File - MultiPack 4A</i></span>