No, "thumping" is not an abstract noun. It is a gerund form of the verb "thump", which means to hit or strike something heavily. Abstract nouns refer to intangible concepts or qualities, such as love or freedom.
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The abstract noun for "load" is "loading."
The abstract noun for "tight" is tightness.
The abstract noun of "inflate" is inflation.
The abstract noun of "heavy" is "heaviness."
The opposite abstract noun for turbulence would be "calmness" or "tranquility."