Necessitating rhymes with:
incapacitating, resuscitating, gravitating, incapacitating, resuscitating, agitating, debilitating, devastating, dictating, facilitating, gravitating, hesitating, imitating, incapacitating, irritating, levitating, meditating, overstating, permutating, precipitating, rehabilitating, resuscitating, rotating, understating
Necessitating sounds like:
nastiness, nauseating, negating, negotiating, negotiations, nesting, nicotine's, nighttimes, nonacademic