Can someone explain how to classify a sequence like -ump in morphemics? Even though it is neither inflectional, grammatical, nor unbound, this meaningful particle can become distributed into a series of rhyming lexemes very similar in meaning, only for the difference in their substance. Consider:
lump, clump, thump, bump, slump.... just to name a few.
What are these called?
(It's for a research project I'm doing on onomatopoeia) Thanks!