Answer:
A synonym is a word that is similar to other words, but not the same. Take the word flawed. A synonym could be defective or faulty. A vocabulary word is a word that is new to somebody and could be very prestigious and formal. For example, the word adequate could be vocabulary. Or maybe the word delectable.
P.S: If you're wondering, adequate means good or fine, and delectable means tasty or delicious.
Answer:
I don't know if this answers your question, but the character for sing is 唱(chàng). To look for this character, the first radical that Annie should look for is 口(kǒu) because it is the first radical of this character.
Terence Tao is a supreme problem-solver whose spectacular work has had an impact across several mathematical areas. He combines sheer technical power, an other-worldly ingenuity for hitting upon new ideas, and a startlingly natural point of view that leaves other mathematicians wondering, " Why didn't anyone see that before?"