We found one dictionary that defines the word repulsive forces:

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1. repulsive forces: Vocabulary.com

(Note: See repulsive_force as well.)

Definitions from WordNet (repulsive force) ▸ noun:  the force by which bodies repel one another ▸ Also see repulsive_force ▸ Words similar to repulsive forces ▸ Usage examples for repulsive forces ▸ Idioms related to repulsive forces ▸ Wikipedia articles (New!) ▸ Words that often appear near repulsive forces ▸ Rhymes of repulsive forces ▸ Invented words related to repulsive forces