Isotherm : Lines of equal temperature
Contour : Lines joining point of equal elevations
Isobar : Lines of equal pressure
Isohyets : Lines of equal rainfall
Isotach : Lines of equal wind speed
Isobaths: Imaginary lines connecting points of equal water table elevations
Isopleths : Lines of equal water depth
Isoclines : A curve connecting the least cost combinations of input for all output
Isohels : Lines of equal sunshine duration
Isophene: Lines connecting points of similar seasonal phenomenon
Isonephs : Lines of equal cloud cover
Isotopes: Elements having equal number of neutrons
Isonomals : Lines of equal thermal anomalies
Isallobars : Lines of equal pressure change
Thermoisopleths : Lines of equal soil temperature
Isochrones : Lines joining points of equal time for a specific event (e.g., onset of rainfall)