Meaning: Peas are small, ball-shaped vegetables that taste very good.
Choice of Words: Round means having a shape like a ball. Delicious means tasting very good.
Meaning: This sentence is saying the same thing as the first sentence, but it uses different words to describe the peas.
Choice of Words: Spherical means shaped like a ball, just like round. Delectable means very delicious.
Meaning: This sentence is also saying the same thing as the first two sentences, but it uses even more different words to describe the peas.
Choice of Words: Circular means the same as round and spherical. Delightful means very pleasing to the taste.