What's causing the knock/rattle over bumps?

I've gotten under it 3 times now (03 Honda Pilot) and can't find where it's coming from. ALL bushings appear to be intact, can't move links, sway bar, tie rods. Wheels do not tick, whine, squeal, squeak or pop when I turn them. Tried to bounce it from top AND from underneath, not a sound. But, when I go over bumps, most ones where the wheels have to drop, rather than rise, it knocks and rattles. Engine does not have excessive movement in gear. The only problem I found underneath was the Inner CV boots are leaking. I don't have a jack so I didn't and can't jack it up. Is it possible it's CV axles causing it?

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