We can use a dictionary to help identify the words below:
1. fashion models walk along this - catwalk
2. type of fish - Catfish
What is a catwalk?
A catwalk is a raised and narrow walkway used by fashion models to display clothing. The word begins with cat- so we can conclude that describes the first description which is - fashion models walk along this.
Secondly, the word, catfish is a type of fish and it fits the description of a type of fish. The two examples show that the context of speech can give us an idea of the specific words being referred to. So, catwalk and catfish are the two words.