Considering our times, Grendel could be compared to fascism because it also threatens to destroy our values, such as democracy and freedom of speech. Taking the comparison one step further, Grendel's skin is invulnerable to swords, spears and arrows, as a fascist person might be "invulnerable" to egalitarian thoughts.
Brave New World carries the the characteristics of current science and technology, but the technology is far beyond what is actually possible. The novel renders a future society where the population is controlled to the points that they abandon ethics, morality, and emotion. Brave New World differed from other science fiction novels because it doesn't feature monsters, aliens, or the supernatural creatures. However, it practices the themes which inspired the later works in science fiction writing.
Thrush, Bush
Eye rhyme is when two words look like they should rhyme because they are spelled the same. However, the words do not actually rhyme because they are not pronounced the same. Thrush and bush both have the same ush spelling at the end. Thrush is pronounced with a short u /uh/ sound. Whereas bush has a short /oo/ sound.
Bough and Plough both have the "ow" sound. Shrill and hill both have the short /i/ sound. Shed and bred both have the short /e/ sound.
First off do you mean the game tetris? If so here is the answer:
Tetra is a prefix which means “four” and is used when forming compound words. In tetris, we use pieces (called tetrominos), which are formed by combining 4 small blocks (called minos). There are 7 possible types of tetrominos named after the letters that they resemble: I, O, L, J, T, S, and Z.