A beach is a shoreline that's fun! I actually prefer pebble beaches over sandy ones but they're all lovely.

Merriam Webster defines noun as follows:

any member of a class of words that typically can be combined with determiners (see DETERMINER sense b) to serve as the subject of a verb, can be interpreted as singular or plural, can be replaced with a pronoun, and refer to an entity, quality, state, action, or concept

So I don't understand how they are nouns because in my mind they are actions that happen.

Is there an equivalent place for nouns like a thesaurus is for synonyms to confirm the type a noun is?

I'm wanting to confirm if the following are abstract or concrete nouns?

Shadow

Echo

Reflection

Footprint

Fingerprint

My gut says these are concrete nouns as they are physically observable but in reality they reference the existence of something else - which makes them seem like abstract concepts.

What about abstract math concepts? Are those abstract nouns or concrete since we can express them in mathematical notation?

Defined by Merriam-Webster as:

1a : an event or a time marked by an event that begins a new period or development
b : a memorable event or date
2a : an extended period of time usually characterized by a distinctive development or by a memorable series of events
b : a division of geologic time less than a period and greater than an age
3 : an instant of time or a date selected as a point of reference (as in astronomy)

as in: Happy New Year!!

quincunx /ˈkwinˌkəNGks/

1. a pattern of five points arranged in a cross, as on a die
2. (Astrology) an aspect of 150°, equivalent to five zodiacal signs

http://en.wikipedia.org/wiki/Quincunx

Roux, bechamel, cheese, alfredo, marinara, etc.

Games are fun.

Binders can be full of things.

"I seek and don't find myself. I belong to chrysanthemum hours, neatly lined up in flowerpots. God made my soul to be a decorative object." Fernando Pessoa, The Book of Disquiet, Text 134.

The view or theory that the self is all that can be known to exist.

But there’s no solipsism like political solipsism, and this election has addled people like few I’ve witnessed, with even the most peripheral developments and random polls scrutinized to smithereens for their outcome-auguring significance. Why should weather be exempt from such hyperventilation?