HackerVoca

fright : dismay, terror, panic
frighten : scare, terrify, alarm, dismay
frightful : alarming, awful, horrible, gruesome adjective
very unpleasant and shocking, and usually connected with death or injury; grisly: Spare me all the gruesome details.
gruesomely adverb

frugal : economical, thrifty
fruitless : futile adjective
actions that are futile are useless because they have no chance of being successful: a futile attempt to save the paintings from the flames | be futile to do sth: It was futile to continue the negotiations.
futility / / noun [uncountable] sterile, unproductive