P3H4O1T1O1I1O1N1I1Z10I1N1G2
28 points
PHOTOIONIZING is validvalid
PHOTOIONIZE, to ionize under the influence of light [v]
PHOTOIONIZE, to ionize by electromagnetic radiation, also PHOTOIONISE [v]
PHOTOIONIZE, to ionize under the influence of light [v]
PHOTOIONIZE, to ionize by electromagnetic radiation, also PHOTOIONISE [v]