at hand
• close by.
• "a mortar burst close at hand"
on hand
• present, especially for a specified purpose.
• "her trainer was on hand to give advice"
Similar:
ready,
at the ready,
available,
accessible,
handy,
at one's fingertips,
prepared,
primed,
on standby,
standing by,
on stand-to,
on call,
on full alert,
on tap,
• needing to be dealt with.
• "they had many urgent and pressing matters on hand"