These conjunctions indicate opposition among the elements that they join. These conjunctions are:

Pero = but
Mas = however
Sino = but, rather
Sin embargo = nevertheless, however
No obstante = regardless
Antes bien = on the contrary
Con todo = even so
Más bien que = rather than
Fuera de = apart from
Excepto = except
Salvo = Except (for)
Menos = but
Más que = even if, however much
Antes = before
Que no

Examples:

• Quería un helado, pero no tenía dinero. / I wanted an ice cream, but I did not have enough money.
• Él no quería descansar sino trabajar mas. / He didn’t  wnat to rest but rather work harder.
• Salgo a correr todos los días, excepto cuando llueve. / I jog every day, except when it rains. 
• La guerra no es el camino, antes bien busquemos la paz. / War is not the way, rather let’s seek peace.