| fanatical(adjective, ardent, fervent, zealous, avid) |
| fervent(adjective, passionate, heavy, hot, ardent) |
| fervid(adjective, passionate, heavy, hot, ardent) |
| fierce(adjective, ardent, fervent, zealous, avid) |
| fiery(adjective, passionate, heavy, hot, ardent) |
| fired-up(overwrought, worked-up, keyed-up) |
| flaming(adjective, passionate, heavy, hot, ardent) |
| flushed(passionate, inflamed, rutilous) |
| fond of(expression, passionate, inflamed, rutilous) |
| forceful(adjective, ardent, fervent, zealous, avid) |
| freaked-out(overwrought, worked-up, keyed-up) |
| frenzied(adjective, ardent, fervent, zealous, avid) |
| geared up(expression, passionate, inflamed, overwrought, worked-up) |
| glowing(adjective, passionate, heavy, hot, ardent) |
| groovy |
| have cold feet(expression, idiom, passionate, inflamed, rutilous) |
| headlong(adjective, ardent, fervent, zealous, avid) |
| heartfelt(adjective, ardent, fervent, zealous, avid) |
| heated(adjective, passionate, heavy, hot, ardent) |
| heavy(adjective, passionate, hot, ardent, fervent) |