eclipse

[1]	conceal , hide , blot out , obscure , block , veil , shroud , cover , darken
[2]	overshadow , overshadow , dominate , obscure , surpass , top , outshine
[3]	occult

[1]	occultation
[2]	concealment , covering , hiding , blocking , blockage , occultation , obscuring , obscuration , darkening , shading , dimming
[3]	decline , downturn , slump , recession