[nour al3mr]

“allomorph.

plural
cats consists of cat + s
buses consists of bus+es
so, s- + -es are allomorph to one morpheme which is plural

“homophony

bank: a river
bank: a financial institution

“polysemy.

Head: Part of the body
Head: your boss or manager in your work
the relationship between theses two meaning is that both are essential

assimilation” and “elision

Assimilation: I can go
Elision: friendship