1) Active 2) Current 3) Existing 4) Indecisive 5) Permanent 6) Sequential 7) Slow 1) Current 2) Currently happening 3) In progress 4) Like many investigations 5) Like some investigations 6) Not stopped 7) Not stopping 8) Proceeding uninterrupted 9) Still happening 10) Still in process 
• (n.) The act of going forward; progress; (pl.) affairs; business; current events.
On'go`ing noun The act of going forward; progress; ( plural ) affairs; business; current events. « The common ongoings of this our commonplace world, and everyday life.» Prof. Wilson. 
[adj] - currently happening
on-going adjective currently happening; `an ongoing economic crisis`
[Scientific terms] currently happening