The correct responses that can be found using a dictionary for the word "ambiguous" are:
- a) definition
- b) spelling
- c) pronunciation
- d) anonyms and synonyms (though typically it's "antonyms and synonyms")
So, the answers are:
- a) definition
- b) spelling
- c) pronunciation
- d) anonyms and synonyms
(Note: Make sure to correct "anonyms" to "antonyms" if there is an option to reflect that.)