| fiend for(expression, adjective, absorbed, occupied, engaged) |
| fiendish(adjective, desire, troubled, absorbed, fanatical) |
| fixated(adjective, desire, troubled, absorbed, fanatical) |
| fraternal(adjective, similar, linked, relevant, connected) |
| full(complete, busy, occupied, working, engaged) |
| full of business(expression, idiom) |
| germane(adjective, similar, linked, relevant, connected) |
| gone(adjective, involved, absorbed, occupied, engaged) |
| gripped(adjective, desire, troubled, absorbed, occupied) |
| hampered |
| handcuffed |
| harassed(adjective, desire, troubled, absorbed, fanatical) |
| hard at it(expression, idiom) |
| hard at work(expression, idiom) |
| haunted(adjective, desire, troubled, absorbed, fanatical) |
| have on the brain(expression, adjective, idiom, desire, troubled) |
| having a full plate(expression, idiom, active, occupied, working) |
| having fish to fry(expression, idiom, active, occupied, working) |
| having many irons in the fire(expression, idiom, active, occupied, working) |
| head over heels(expression, adjective, idiom, absorbed, occupied) |