Ant. Unproductive, sterile, barren, fruitless, useless, abortive, ineffectual.
Fruition. Fulfilment, enjoyment; reaping, attainment, use, possession.
Ant. Loss, disappointment, non-attainment.
Fugacious. Transitory, transient, evanescent, fugitive, ephemeral, fleeting.
Ant. Persistent, perennial, permanent, perpetual.
Fulfil. Accomplish, effectuate, effect, realize, execute, consummate, complete, perfect; obey, observe, perform, do, discharge, keep, adhere to, comply with; meet, satisfy, answer, fill, fill out; verify, achieve.
Ant. Neglect, ignore; falsify, disappoint; render abortive; overlook, disregard, slight.
Fulminate. Explode, detonate; utter denunciations, thunder, fulmine, hurl threats; clamor, roar, denounce, vociferate.
Ant. Laud, panegyrize, eulogize.
Fulsome. Gross, excessive, offensive, extravagant, nauseous, disgusting, repulsive, coarse, ribald, questionable, loathsome, sickening, fawning.