| fervor |
strength, heatedness, or intensity of feeling; impassioned enthusiasm. [1/2 definitions] |
| fiend |
(informal) one who is addicted to or has a consuming enthusiasm for something. [1/3 definitions] |
| fool |
one who has an unreasonable enthusiasm for some activity. [1/11 definitions] |
| frenzy |
a seizure marked by violent agitation, excitement, or enthusiasm, or the activity accompanying such a seizure. [1/3 definitions] |
| furor |
a state of general excitement or intense enthusiasm. [1/4 definitions] |
| geek |
a person who has extreme enthusiasm for or expertise in a particular subject or activity, esp. in the areas of technology or science. [1/3 definitions] |
| go overboard |
to do far too much out of excessive enthusiasm or anxiety; go to extremes. |
| halfhearted |
accomplished with or showing little interest or enthusiasm. |
| heat |
intensity of emotion; anger; passion; enthusiasm. [1/13 definitions] |
| lackadaisical |
lacking energy, determination, or enthusiasm; listless or lazy. |
| leaden |
lacking in enthusiasm and vigor; sluggish; listless. [1/4 definitions] |
| like crazy |
(informal) exceedingly or with extreme enthusiasm. |
| like mad |
(informal) with great speed or enthusiasm. |
| love affair |
an intense, sometimes uncritical enthusiasm for or interest in something. [1/2 definitions] |
| lukewarm |
manifesting little interest or enthusiasm. [1/2 definitions] |
| lust |
any great desire or enthusiasm (usu. fol. by "for"). [2/3 definitions] |
| lyricism |
a strong, spontaneous outpouring of subjective feeling; enthusiasm; exuberance. [1/2 definitions] |
| -mania |
great or excessive love of or enthusiasm for. [1/2 definitions] |
| mania |
an extreme desire or enthusiasm. [1/2 definitions] |
| maniac |
one who has an excessive desire or enthusiasm. [1/4 definitions] |
| mob |
to crowd about (someone) in a disorderly way, as when moved by extreme enthusiasm or anger. [1/9 definitions] |