The crossword solutions for the term 'capable of making an error' are 'ABLE' and 'HUMAN'. This phrase is often used to describe the fallibility of HUMAN beings, as humans are capable of making mistakes. It is a reminder that no one is perfect and that everyone is prone to errors. The two words in the crossword solutions represent this idea, as 'ABLE' implies capability and 'HUMAN' refers to the species that is capable of making mistakes.