熱心【ねっしん】
zealous, enthusiastic, ardent, fervent, keen, eager
熱帯【ねったい】
tropics
情熱【じょうねつ】
passion, enthusiasm, zeal
熱気【ねっき】
heat, hot air, enthusiasm, excitement, fervour, fervor, heated atmosphere, fever
熱意【ねつい】
zeal, enthusiasm, ardor, ardour
熱い【あつい】
hot (to the touch), passionate (feelings, etc.), ardent, hot (e.g. gaze), hot (e.g. temper), zealous, enthusiastic, fired up, intense, severe, extreme, hot (topic), of interest
熱烈【ねつれつ】
ardent, passionate, vehement
加熱【かねつ】
heating, application of heat
発熱【はつねつ】
generation of heat, (attack of) fever, pyrexia
高熱【こうねつ】
high fever, pyro-
熱湯【ねっとう】
boiling water
白熱【はくねつ】
white heat, incandescence, (emitting) white light, white glow, becoming excited, getting heated (e.g. of a discussion), reaching a climax
熱する【ねっする】
to heat, to heat up, to get excited, to get worked up, to get fired up
亜熱帯【あねったい】
subtropics
微熱【びねつ】
slight fever
耐熱【たいねつ】
heat-resisting
光熱費【こうねつひ】
cost of fuel and lighting, cost of heat and electricity, energy bill, utility cost
熱中【ねっちゅう】
being enthusiastic about, being wild about, being absorbed in, being engrossed in, being devoted to
熱病【ねつびょう】
fever, febrile disease
解熱【げねつ】
lowering a fever, alleviation of fever