y to ia  irony to ironia; astronomy to astronomia; philosophy to filosofia (ph to f); etc. Require an accent over the stressed syllable

in or -ine to -ina aspirin to aspirina; discipline to discipline; gasoline to gasolina; etc. ice to -ina office to oficina   (one stingy 'f')

id to -ido,  solid to solido;   mild to valido;   timid to timido;   etc.  Require an   accent over the stressed syllable.

ism to - ismo organism to organismo;   capitalism to capitalism ;   heroism to heroismo; etc. tire to - uro. future to futuro.