Are you trying to hyphenate p.a.? Unfortunately it cannot be hyphenated because it only contains one syllable.
| noun | public address system, P.A. system, PA system, P.A., PA, communication system
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| noun | dad, dada, daddy, pa, papa, pappa, pater, pop, father, male parent, begetter |
| noun | protactinium, protoactinium, Pa, atomic number 91, metallic element, metal |
| noun | pascal, Pa, pressure unit
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| noun | Pennsylvania, Keystone State, PA, American state
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| adv | per annum, per year, each year, annually |