Here are the answers based on the pronunciation of the underlined parts:

1. **C. freight** (The "ei" is pronounced as /eɪ/, unlike "height" and "weight" which are pronounced with /aɪ/).
2. **A. congratulation** (The "u" in "congratulation" is pronounced differently compared to the "a" in "fantastic").
3. **A. excited** (The "e" is pronounced as /ɪ/, while "interested" has a schwa sound).
4. **B. owl** (The "ow" in "owl" is pronounced /aʊ/, while "spoon" and "food" have a different vowel sound).
5. **C. crown** (The "ow" in "crown" is pronounced differently than the "ow" in "tower" and "owl").

So, the different word for each question is:
1. C
2. A
3. A
4. B
5. C