Are feelings always a noun? For example, "headache" or "nausea". Why I am asking this question is because I always have a problem with countable and uncountable nouns. First job is identify the nouns. Thus, I am asking is feeling a noun always.
A noun is generally defined as "a person, place, thing, or idea". So a thing that you are feeling or can feel must be a noun, because it is a "thing". So yes, "headache", "nausea", "happiness", "depression", etc, are all nouns.
The state of feeling a certain way is an adjective. So in "I feel nauseous" or "The happy man left the room", "nauseous" and "happy" are adjectives.
"Feel" is a verb. It's present participle is "feeling", as @Damkerng T. mentioned in the comments.
However, "feeling" is also the noun. It is countable. Here are some examples of its usage:
I have a feeling tonight's going to be a good night.
It's an uncomfortable feeling, knowing that it could all be over soon.
I hate feelings of pain; headaches, nausea etc.
The question asks about feelings, which may refer to:
- Normal body sensations, like warmth and sleepiness
- Feelings as symptoms of a disease, like a headache and nausea
- Heart feelings or emotions, like joy, peace, fear or anger
- Certain mental states, like confidence, uncertainty
A noun is a word that refers to a person, place, thing, event, substance, or quality (Cambridge Dictionary). You can say that a feeling is a quality, so, in general, all feelings as independent words are nouns.
Most body sensations, emotions and mental states are uncountable. You don't say warmths, joys, angers or confidences. Still, some can be countable, for example, "I have a fear of driving." or "I have many fears."
Feelings as symptoms of a disease may be countable or not, which depends more on the usage of the articles in medical terminology rather than on grammar.
Example of countable symptoms:
- I had a headache/frequent headaches, a fever/frequent fevers, a pain/frequent pains.
Examples of uncountable symptoms:
- I had nausea and jaundice.
Some symptoms end with -ing, but they are still nouns, like itching or bloating.
And of course, you can express feelings as adjectives: happy feeling, painful arm, etc.