| faint-hearted(passionate, inflamed, rutilous) |
| falling hook line and sinker(expression, adjective, idiom, susceptible, gullible) |
| fascinated(passionate, inflamed, rutilous) |
| fast talk(expression, undemanding, promiscuous, realizable) |
| feasible(undemanding, promiscuous, realizable) |
| feracious(adjective, unassertive, fertile, loamy) |
| fertile(adjective, unassertive, loamy) |
| fire eating(expression, susceptible, risky) |
| fired-up(overwrought, worked-up, keyed-up) |
| fired up(expression, passionate, inflamed, overwrought, worked-up) |
| flaccid(inactive, inert, unreceptive) |
| flaming(passionate, inflamed, rutilous) |
| flexible |
| flipper(undemanding, promiscuous, realizable) |
| flowing with milk and honey(expression, adjective, idiom, unassertive, fertile) |
| flushed(passionate, inflamed, rutilous) |
| flying high(expression, passionate, excited, inflamed, interested) |
| fond of(expression, passionate, inflamed, rutilous) |
| fraught with danger(expression, idiom, susceptible, risky) |
| freaked-out(overwrought, worked-up, keyed-up) |