Is vowed an abstract noun

No, "vowed" is not an abstract noun; it is the past tense of the verb "vow," which means to make a solemn promise. Abstract nouns refer to concepts, ideas, or qualities that cannot be physically touched or seen, such as love, freedom, or bravery. While the concept of a "vow" itself can be considered an abstract noun, "vowed" describes the action of making that promise.