The whole deck

Both mean 'to be' — but ser is identity, estar is state. The rule about permanent vs temporary will get you in trouble.

Both are past tense of ser — fue is a completed snapshot, era is the background scenery.

Para points forward to a goal or recipient. Por looks back at cause, exchange, or movement through.

Saber is knowing facts and skills. Conocer is familiarity through experience — people, places, things you've encountered.

Quedar is making the plan to meet. Salir is the activity of going out. You can have one without the other.

Both express how long something has been going on — but they're built differently and can't be swapped.

Preguntar is asking a question. Pedir is asking for something — a request, an order, a demand.

Both translate as 'can' — but poder is physical ability or permission, saber is knowing how.

Both mean 'must' or 'have to' — deber is moral obligation, tener que is practical necessity.

Spanish anchors movement to where the speaker is right now — the opposite of English more often than you'd think.

Like ir/venir but for objects — llevar is taking something away, traer is bringing it here.

Both mean 'to love' — but querer is the everyday word for love and wanting, amar is deeper and more formal.

Mirar is looking (actively directing your gaze). Ver is seeing (the result — what registers in your eyes).

Escuchar is listening (active). Oír is hearing (passive — sound entering your ears whether you want it or not).

Both mean 'to remember' — acordarse is reflexive and personal, recordar can also mean to remind.

Sentir is feeling or sensing something external. Sentirse is how you feel inside — your personal emotional state.

Both translate as 'to think' — pensar is active thinking or planning, creer is holding a belief.

Both translate 'to spend' in English — gastar is spending money, pasar is spending time.

Hablar is talking (the activity). Decir is saying or telling (the content of what's communicated).

Buscar is the searching. Encontrar is the finding. One is the journey, one is the result.

Perder is losing something. Faltar is something being missing or absent — the gap itself.

Both can relate to playing — jugar is playing games/sports, tocar is playing instruments and also 'touching.'

Both mean 'to return' — volver is universal Spanish, regresar is more Latin American and slightly more formal.

English 'leave' covers both — dejar is leaving something/someone behind, salir is leaving a place.