The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

then, even the outer islands had fallen within his grasp. 5
understanding, comprehension, apprehension, awareness,
perception, sense: He has a poor grasp of the basics of the
subject.
grasping adj. greedy, avaricious, acquisitive, rapacious, mean, miserly,
stingy, penurious, parsimonious, niggardly, tight, tight-fisted,
penny-pinching, close-fisted, mercenary: If the company weren't
so grasping, they'd have less difficulty hiring staff.
grass v. 1 inform, betray, give away, Slang peach, squeal, snitch,
squeak, tattle, rat on, sell out, Brit blow the gaff, nark: He
received a shorter sentence for grassing on his accomplices.
--n. 2 traitor, informer, Slang stool-pigeon, stoolie,
squealer, snitch, squeaker, rat, Brit nark: A grass is treated
roughly by fellow inmates.
grate v. 1 shred, rasp, scrape, rub, triturate: Peel six raw
potatoes and grate them fine. 2 scrape, rasp, rub, grind,
scratch, screech, stridulate: The cricket grates its legs
against its wing covers to produce the 'singing' sound. 3 Often,
grate on or upon. annoy, vex, irk, irritate, pester, set one's
teeth on edge, jar, fret, chafe, rub (someone) (up) the wrong
way, go against the grain, Colloq get on one's nerves: Her
voice just grates on me.
grateful adj. thankful, appreciative: I am grateful for any help I can
get.
gratification
n. satisfaction, fulfilment, enjoyment, pleasure, delight,
compensation, recompense, reward, return, requital: She does it
only for the gratification she gets from making the children
happier.
gratify v. please, satisfy, fulfil, delight, compensate, recompense,
reward, requite, cheer, gladden, favour: Albert would be
gratified to see the good coming from his charitable bequests.
grating adj. 1 jarring, strident, raucous, harsh, discordant,
dissonant, unharmonious, offensive, irritating, irksome,
annoying, vexatious, galling: I find the noise of chalk