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
熱意【ねつい】
zeal, enthusiasm, ardor, ardour
熱気【ねっき】
heat, hot air, enthusiasm, excitement, fervour, fervor, heated atmosphere, fever
熱戦【ねっせん】
fierce fight, close contest
過熱【かねつ】
superheating, overheating
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
熱狂【ねっきょう】
wild enthusiasm, being crazy about
熱烈【ねつれつ】
ardent, passionate, vehement
加熱【かねつ】
heating, application of heat
断熱【だんねつ】
insulation
発熱【はつねつ】
generation of heat, (attack of) fever, pyrexia
高熱【こうねつ】
high fever, pyro-
熱帯魚【ねったいぎょ】
tropical fish
熱湯【ねっとう】
boiling water
熱弁【ねつべん】
impassioned speech, fervent speech
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
熱風【ねっぷう】
hot wind
熱する【ねっする】
to heat, to heat up, to get excited, to get worked up, to get fired up