Where is the list of words?
One cell, many cells?
What sort of justification are you speaking of?
Couple of things come to mind.
If all in one cell, Edit>Fill>Justify will place then in single cells in a
column where you have selected the cell and several below it.
Or to change line-spacing in a cell with several lines of wrapped text go to
Cells>Format>Alignment>Vertical>Distributed.
Play with the column width and row height to get the effect you desire.
Gord Dibben MS Excel MVP