geographical geográfico

mechanical mecánico

memorial memorial

mental mental

metal metal

mineral mineral

minimal mínimo

monumental monumental

moral moral

mortal mortal

municipal municipal

musical musical

mutual mútuo

national nacional

natural natural

neutral neutral

normal normal

occasional ocasional

official oficial

optical óptico

optional opcional

oral oral

original original

pedal pedal

penal penal

perpetual perpétuo

personal personal

pharmaceutical farmaceútico

philosophical filosófico

plural plural

postal postal

potential potencial

presidential presidencial

principal principal