see more lists of antonymns here.
detrás, atrás, tras – delante, enfrente
- abrir – cerrar to open – to close
- aburrido – divertido boring – fun
- aceptar – rechazar /rehusar to accept – to reject
- acertado – equivocado accurate – wrong
- acertar – fallar to get right – to fail
- activo – pasivo active- liability
- afirmar – negar to affirm – to deny
- alegre – triste joyful – sad
- alegría – tristeza joy – sadness
- alto – bajo tall – short
- amigo – enemigo friend – enemy
- amor – odio love – hate
- ancho- estrecho width – tight
- arriba – abajo up – down
- barato – caro cheap – expensive
- bendito – maldito blessed – cursed
- blanco – negro white – black
- bonito – feo beautiful – ugly
- bueno – malo good – bad
- calor – frío heat – cold
- cansar – descansar to tire – to rest
- cerca – lejos near – far
- cielo – infierno heaven – hell
- claro – oscuro clear – dark
- cobrar – pagar to collect – to pay
- comer – ayunar to eat – to fast
- comprar – vender to buy – to sell
- con – sin with – without
- concreto – abstracto concrete – abstract
- construir – destruir to build – to destroy
- correcto – incorrecto correct – incorrect
- dar – recibir to give – to receive
- delgado – gordo /grueso thin – fat
- derecha – izquierda right – left
- despertar – dormir to awaken – to sleep
- día – noche day – night
- dulce – salado sweet – salty
- empezar – acabar to start – to end
- entrada – salida entrance – exit
- entrar- salir to come in – to come out
- fácil – difícil easy – difficult fácil – difícil
- feliz – infeliz happy – unhappy
- fuerte – débil strong – weak
- futuro -pasado future – past
- ganador – perdedor winner – looser
- grande – pequeño big – small
- guapo – feo handsome – ugly
- hablar – callar to talk – to keep quiet
- hola – adiós hello – goodbye
- hombre – mujer man – woman
- humilde – orgulloso humble – proud
- igual – distinto equal – distinct
- interno – externo internal – external
- joven – viejo young – old
- junto – separado together – separate
- justicia – injusticia justice – injustice
- juventud – vejez youth – old age
- legal – ilegal legal – illegal
- levantarse – acostarse to wake up – to go to bed
- ligero – pesado light – heavy ligeiro – pesado
- limpiar – ensuciar to clean – to dirty
- lleno – vacío full – empty
- luz – sombra light – shadow
- macho – hembra male – female
- más – menos more – less
- mayor – menor bigger – smaller
- mejor – peor better – worse
- moderno – antiguo modern – ancient
- mostrar – ocultar to show – to hide
- móvil – fijo moving – fixed
- mucho – poco much – little
- novato – veterano novice – veteran
- nuevo – viejo new – old
- optimista – pesimista optimistic – pessimistic
- orden – caos order – chaos
- paciencia – impaciencia patience – impatience
- par – impar pair – odd
- paz – guerra peace – war
- perdonar – castigar to forgive – to punish
- posible – imposible possible – impossible
- pregunta – respuesta question – answer
- primero – último first – last
- principio – final o fin beginning – end
- recordar – olvidar to remember – to forget
- rico – pobre rich – poor
- sabio – ignorante wise – ignorant
- salud – enfermedad health – disease
- seco – mojado dry – wet
- sí – no yes – no
- siempre – nunca always – never
- simpático – antipático nice- unfriendly (nasty)
- simple – complejo / complicado simple – complex
- soltero – casado single – married
- solución– problema solution – problem
- suave – áspero soft – rough
- subir – bajar to go up – to go down
- temprano – tarde early – late
- tranquilo – nervioso quiet – nervous
- valiente – cobarde brave – cowardly
- verdad – mentira truth – lie
- verdadero – falso true – false
- vivo – muerto alive – dead
Sources
https://www.practicaespanol.com/101-palabras-en-espanol-y-sus-contrarias-antonimos/