5. Morphology in Relation to Phonology

F. Plank, Morphology I: 5. Morphology in Relation to Phonology 17
For present purposes it must suffice to draw attention to the boundary
(which is sometimes diffuse) between mor(pho)phonology and
allomorphic morphology. Illustration will again come from English.
In English there are word pairs like these:
time – temp-oral,
flower – flor-al,
moon – men-strual,
rule – regul-ar,
lion – leon-ine,
peace – pac-ifist,
satisfy – satisfac-tion (vs. clarify – clarific-ation),
expel – expuls-ion,
deceive – decep-tion,
consume – consump-tion,
describe – descrip-tion,