Trustworthy, mature, steadfast, reliable, conscientious...
responsible
responsible
answerable accountable chargeable
You could describe the person as being "to blame". That would be a substitute for "responsible". Considering another sense of the word, "trustworthy" can also mean responsible.
responsible
ANSWERABLE : (held) responsible (for), culpable, accountable, liable
accountableanswerableamenableliabletrustworthy
responsible
Responsible and obediant and oh i forgot your mom!
answerable reliable accountable amenable
additional. OR any other OR any more --- OR another OR one more
another word for more is innumerable,over and above,expanded,increased,wider,or extend.