WHICH WORD CAN BE ADDED TO THE FOLLOWING GROUPS OF WORDS TO MAKE FOUR NEW WORDS

[GRENDONIAN]

LESS,WHIP, ATE CON

MICE,WASH,CELLS.PAPER

ICE,OLD,UNDER,HEAD

[smouse]

age

[Elfin]

Second one is White

[Jansy]

Could the first one be CORD?

[GRENDONIAN]

THANKS FOR THE ANSWERS SO FAR I FORGOT ONE

WORK,CHARGE,TOOL, CART

ANY IDEAS

[Marsh]

4 could be hand, if you accept hand tool (as opposed to machine tool).