Does the accent always dissapear in plural?

Question

As I was learning, I noticed this tendency but haven't met any particular rule yet. What about the word "automóvil"? The plural of it is "automoviles"?

Answer 1

No. This is most definitely not a rule. The plural or "automóvil" is "automóviles". The plural of "cáncer" is "cánceres".

Automático - automáticos

Mamífero - mamíferos.

Whether you use and accent mark or not generally has more to do with which one is the accented syllable of the resulting word (when you make it plural, that is).

Answer 2

lápiz, lápices

Answer 3

Only if the accent is on the last syllable

(Then it dissapears from that syllable, I mean)

Answer 4

Lección is one example where the plural does not have an accent, i.e., lecciones. That's because the stress shifts to the "o" (the next to the last syllable) when you put in plural form.