Mild temperatures that range from the high 50s to the upper 70s in September and the low 40s and upper 50s in November make touring around Madrid's El Rastro market and Retiro Park immensely enjoyable. This is a good time to find a deal on a hotel since many slash their rates this time of year.
changeover - an event that results in a transformation. conversion, transition. transformation, transmutation, shift - a qualitative change. glycogenesis - the conversion of glucose to glycogen when the glucose in the blood exceeds the demand. isomerisation, isomerization - the conversion of a compound into an isomer of itself.
To change is to make a material difference so that the thing is distinctly different from what it was: to change one's opinion. To alter is to make some partial change, as in appearance, but usually to preserve the identity: to alter a dress, as by raising the hem (to change a dress would mean to put on a different one).