| A | B |
| confidence | to have faith or trust in |
| confide | to trust another with one's secrets |
| diffident | [distrust oneself] lacking confidence in oneself; timid or shy |
| fidelity | faithfulness to obligations or duties |
| infidel | an unbeliever; one not of the faithful |
| perfidy | [bad + faith] deliberate breach of faith; treachery or treason |
| affidavit | a written oath or pledge of faith |
| Fido | a faithful pet |
| fiduciary | relating to a holding in trust for another; a trustee |