破壊 (hakai): This is a general term for destruction, meaning to break something apart or cause it to cease to exist.
壊滅 (kaimetsu): This word refers to complete or total destruction, often in the context of war or natural disasters.
滅亡 (metsubou): This term has a similar meaning to 壊滅, but it emphasizes the idea of something disappearing or ceasing to exist entirely.
消滅 (shoumetsu): This word means to vanish, disappear, or be annihilated, often in the context of something being destroyed.
瓦解 (kakai): This term refers to something collapsing, crumbling, or falling apart, often due to internal weakness or external pressure.
解体 (kaitai): This word means to dismantle, disassemble, or break down something into its component parts.