The term 'listened carefully' can be represented by two crossword solutions, 'harked' and 'lentanear'. 'Harked' is a 6-letter word meaning to listen attentively or to pay close attention. 'Lentanear' is a 9-letter word meaning to listen intently or to hear with great care. Both words are synonyms for the phrase 'listened carefully' and can be used to describe someone who is paying close attention to what is being said.