I have write an Antonym and Synonym for each word. Nouns

1. biped---quadruped, person

2. centipede---millipede, worm

3. millipede---unipede, creepy-crawly

4. pedal---foot iever (couldn't find an antonym)

5. pedicure--manicure, beauty treatment

6. quadruped--biped, tetrapod

1 answer

You're on the right track. This is an excellent source for synonyms and antonyms:

http://www.thesaurus.com