An adjective is a part of speech.
verb and verb (infinitive)
Parts of speech are like nouns, verbs, adjectives, article, pronoun etc.
In this context, 'like' is a verb.
A noun (like anything ending in -ISM).
"Eats" is a noun.
When a bird eats a worm, the worm becomes part of the bird's food source and will be broken down in the bird's digestive system for nutrients.
Talon, such as in "a bird's talon" is a noun.
Like most words, "eating" can be used as different parts of speech. It is a noun when used like this: Eating is fun. It is a verb when used like this: She is eating a hot dog for lunch.
It depends how you are using it. If you say "The bird made a nest in the tree" nest is a noun. If you use it like "The bird nested in the birdhouse" then nest is the verb.
The word linnet is a noun. A linnet is a small bird.
The word canary is a noun. A canary is a small bird.
The word glutton is a noun. A glutton is one who eats excessively.
Bills or beaks are the type of mouthpart that a bird has. The beak is shaped in a way for the type of food that the bird eats.
A verb.
noun
noun