暖かい usu. refers to air temperature

warm; mild; (pleasantly) hot

温かい only

considerate; kind; genial

暖かい only

warm (of a colour); mellow

暖かい only

having enough money

gentle; quiet; mild; meek; obedient; docile; well-behaved; tame

quiet (color, pattern, etc.); sober

hot spring

onsen; hot spring resort; hot spring spa

body temperature

temperature

to warm (up); to heat (up)

温める only

to sit on (an idea, plan, etc.); to keep to oneself; to nurse; to mull over

温める only

to renew (an old friendship)

温める only

to take for oneself

(air) temperature

lukewarm; tepid

Usu. written as 緩い

lenient

warmth

warm; mild; genial