簡単めの語
Greedy, the most general of these terms, suggests a naked and uncontrolled desire for almost anything—food and drink, money, emotional gratification: embarrassingly greedy for praise. (Random House)
greedy [gríːdi] (4) a 「最も一般的な語、殆ど全ての物(食べ物、飲み物、お金、感情的な満足感)に対するむき出しで制御されていない欲望を示唆」
難しめの語
acquisitive [əkwízətiv] (18) a 物を手に入れたがる
acquisitive implies both eagerness to possess and ability to acquire and keep <an eagerly acquisitive mind>. (Mirriam-Webster)
「持ちたいという欲求と手に入れて持ち続ける能力を示唆」
avaricious [æ̀vəríʃəs] (24) a とても欲の深い
avarice [ǽvəris] (12) n 強欲
Avaricious often implies a pathological, driven greediness for money or other valuables and usually suggests a concomitant miserliness: the cheerless dwelling of an avaricious usurer. (Random House)
「しばしばお金や他の価値の或るものへの病的で駆られた欲深さを示唆、通常同時にけちでもある」
covetous [kʌ́vətəs] (24) a formal 他人のものをむやみに欲しがる
covet [kʌ́vət] (10) v formal むやみに欲しがる
Covetous implies a powerful and usually illicit desire for the property or possessions of another: The book collector was openly covetous of my rare first edition. (Random House)
「他人の財産や持ち物に対する強力で通常不法な欲求を示唆」
grasping [grǽspiŋ] (16) a 強欲な、けちな
If you describe someone as grasping, you are criticizing them for wanting to get and keep as much money as possible, and for being unwilling to spend it. adj (disapproval)
... a greedy grasping drug-ridden individual... (Collins COBUILD)
「出来る限り多くのお金を得て持っていたいと思い、それを使わないようにしている、と非難」
insatiable [inséiʃəbl] (11) a 飽くことを知らない
always wanting more of something; not able to be satisfied
an insatiable appetite/curiosity/thirst
There seems to be an insatiable demand for more powerful computers.
There’s an apparently insatiable demand for this kind of programme.
The public seems to have an insatiable appetite for celebrity news. (Oxford Advanced Learner's)
「いつもより多くのものを欲しがる、満足することができない」
mercenary [mə́ːrsənèri] (12) n C(pl. -naries) 傭兵、a 欲得ずくの
(disapproving) only interested in making or getting money
a mercenary society/attitude
She's interested in him for purely mercenary reasons. (Oxford Advanced Learner's)
「お金を作ったり得たりすることにだけ興味がある」
rapacious [rəpéiʃəs] (23) a formal (度を越して)強欲な
(formal, disapproving) wanting more money or goods than you need or have a right to
He describes the world of finance as 'a casino full of rapacious capitalists'. (Oxford Advanced Learner's)
「必要以上、権利のある以上の多くのお金や品物を欲しがる」
voracious [vɔːréiʃəs] (14) a formal １．食欲旺盛な、２．(知識を得ることなどに)貪欲な
2. having an extremely strong desire to do or have a lot of something:
▪ a voracious reader
▪ Her appetite for information was voracious. (Longman)
「たくさんの事をしたり、持ったりしたいという強い欲求がある」
参照 (類義語比較)
Random House avaricious
http://www.dictionary.com/browse/avaricious
Random House ravenous
http://www.dictionary.com/browse/ravenous
Mirriam-Webster acquisitive
https://www.merriam-webster.com/dictionary/acquisitive
Mirriam-Webster rapacious