Solutions Useful but unspecified gadget/device has 4 entries with similar clues
- 5-letter words
- angstAcute but unspecified feeling of worry
- 7-letter words
- zillionExtremely large but unspecified number of people or things
- 8-letter words
- appendixIt is useless in body but useful in a book
- 17-letter words
- a-means-to-an-endNot important in itself but useful to the whole