English to Latin Translation

fidus, fidus, accuratus, qualitas, celer.

There is no substantial difference between 'reliable' and 'dependable.' Both are generally translated into Latin as fidus. I am also assuming that by 'fast' you mean 'quick' or 'rapid' and not abstinence from food or 'tight' or 'firm.'

Thank you so much for the prompt reply! Your assumption is correct regarding "fast."