Răspuns :
Piatra - pietroi, pietricica, pietros, piertar, a impietri, impiertit etc.
Padure - padurice, padurar, impadurire, a impaduri, impadurit, reimpadurit, a reimpaduri, reimpadurire etc.
Numar - numerar, numeral, numaratoare, a numara, numarat, nenumarat etc.
Padure - padurice, padurar, impadurire, a impaduri, impadurit, reimpadurit, a reimpaduri, reimpadurire etc.
Numar - numerar, numeral, numaratoare, a numara, numarat, nenumarat etc.
piatra: pietricica, pietros, pietre, pietroi;
padure: padurice, impadurit, padurar, despadurit, a impaduri, a despaduri;
numar: numaratoare, numerar, numeric, a numara, numerotare