heartburn, n. cardialgia, water-brash, pyrosis.
heartburning, n. [discontent], [resentment], envy, [rankling].
hearthstone, n. hearth, [fireside], ingleside. Associated words: Vesta, Hestia.
heartless, a. acardiac; [cruel], [pitiless]. See cruel.
heart-shaped, a. cordate, cordiform.
heartwood, n. duramen.
hearty, a. [cordial], heartfelt, [sincere]; [healthy], [robust], hale; [nourishing], [nutritious].
heat, n. [warmth], caloric; cauma. Associated words: pyrology, pyrologist, thermology, pyrometry, pyrometer, pyronomics, calorifics, therm, thermal, pyrography, caloric, calorie, thermic, swelter, thermostat, thermometer, thermometry.
heat, n. [vehemence], [fire], [ardor], impetuosity, [fervor], [fervency], [zeal], intensity, [enthusiasm]; œstrus, [rut].
heat, v. [warm], calefy.