They are dika and maldika.
I'm assuming you want a sentence with both words. The fat cows and the skinny cows shared the same pasture. You can be fat one year and skinny the next if you follow a good diet plan.
The Esperanto words for far and away are malproskime and for.
The Esperanto words for astronaut and cosmonaut are very similar to the English words. In Esperanto you would use astronaŭto and kosmonaŭto.
The Esperanto words for boring and fun are enuiga and amuza.
The Esperanto words for salt and pepper are salo are pipro.
Generally, Fat cats tend to be fat, and skinny cats usually are known to be skinny.
The Esperanto words for near and far are proksime and malproksime.
The Esperanto words for car and driver are aŭto and ŝoforo.
The Esperanto words for alive and dead are vivas and mortinto.
The Esperanto words for hungry and full are malsata and plena.
The Esperanto words for dark and bright are malhela and brila.
The Esperanto words for broken and fixed are rompita and fiksa.