Collocations for feasible - adj.

appear, be, look, seem
become
consider sth
A tunnel was not considered economically feasible.

prove sth
The treatment has not proved feasible.

entirely, perfectly, quite
It's perfectly feasible to produce electricity without creating pollution.

barely, hardly, not really
administratively, commercially, economically, financially, politically, technically, technologically (esp. AmE)

Feasible is used with these nouns:
proposition, solution