The term 'had faith in' can be expressed in a variety of ways. The crossword solutions for this term are 'trusted' (7 letters), 'swore by' (7 letters), and 'relied on' (8 letters). All three of these terms imply a strong belief or trust in someone or something. To trust someone is to have faith that they will act in a certain way, while to swear by something is to have absolute faith in its truth or accuracy. To rely on someone or something is to have faith that it will provide the necessary support or guidance.