research

[1]	investigate , explore , delve into , dig into , enquire/inquire into , scrutinize , examine , study , analyse , inspect , check in/into/(up) on , probe , experiment with , (Colloq) check out
[2]	search , explore

[1]	investigation , investigating , exploration , delving , digging , enquiry/inquiry , fact-finding , scrutinization , scrutiny , examination , inspection , probing , analysis , experimentation
[2]	inquiry , enquiry