Vaikuntha means, without any trace of grief or pain, the place where perfects peace reigns and there is no flutter of fear. (SSS Vol.7, p. 392)
Ekadasi means the eleventh day of the Lunar fortnight, The phases of the Moon are numbered, and the day after the tenth, Dasami, is referred to as the Ekadasi. But the real meaning of Ekadasi, the eleventh is this : when the senses – the five senses of action and the senses through which knowledge of the objective world is gained - are all coordinated and turned in the direction of God, the 11th then it becomes genuine Ekadasi. This is also the meaning of Namaskar, where you fold both palms together and hold them on your chest, near the heart region. The ten senses surrendered to the person adored with real sincerity in the heart. (NNSG Vol.8, p. 116)