Professions in spanish?

Professions in spanish?
 

it seems i've been having a lot of questions like these so here is one more. i remember that (in general) that the endings dor/a, tor/a and ero/a for a profession is spanish for example the verb "pescar" "to fish" would change to pescador/a "fisher" can someone explain this to me a bit more? thanks!!!

We use that endings for professions but there are not rules for the use of them
I have never study it, when I was younger I just learn the names without rules :S

Constructor
Profesor
Carnicero
Doctor
Profesor
Dentista
oculista

Just a few examples.

I will write other examples, I hope that can useful for you.


Conductor.
Destructor.
Postulador.

Escritor.
Pianista.
Inversionista.


There're some many examples about how you should to write with words ista and tor ending in a sentence or word with that kind to ending in your writing.

Sincerely yours.

The most-reliable rule I've developed has to do with whether the profession/ability/tendency is derived from a verb or a noun.

Suffixes for verbs:
<verb>-jero/a is like -er in English
<verb>-dor/dora is like -tor in English
Examples:
Cerrajero (a locksmith. From "cerrar"... literally, a "closer")
Computadora (computer. From "computar")

<noun>-isto/a is like -ist in English
Example:
pianista (a pianist, from "piano", a noun)

I think there's a tendency for people to get "-jero", and for things to get "-dor", but I need to start compiling a list and see what pattern emerges.