Each pair of clues below can be answered by two words which differ by only a single letter.

1. Install - Accuse

2. Stylish - Irritable

3. White-tie - Layout

4. Sends money - Negligent

5. Swiss state - Deliberate and unprovoked (as violence)

 Answers:

 

1. INDUCT - INDICT

2. SNAPPY - SNIPPY

3. FORMAL - FORMAT

4. REMITS - REMISS

5. CANTON - WANTON