First, let's talk about their interchangeability. There are some contexts where the two words could be used to mean "additional"; however, I think there seems to be a subtle difference in meaning when the word further is used:
The summit ended without any more talks.
The summit ended without any further talks.
I could not have run any further.
I could not have run any more.
In the case of the summit meeting, the word further hints that talks might have helped two sides come closer to an agreement. That's because one meaning of further is:
further (adv.) at or to a more advanced, successful, or desirable stage
(from NOAD)
In the case of the tired runner, any further suggests a greater distance, while any more suggests a longer time. While those meanings overlap, I think further might be a better word for a runner dropping out of a marathon, while more might be a better word for someone working out on a treadmill. That's because further also means:
further (adv.) by a greater distance, or for a longer way
(from NOAD)
As for the book, I think the best way to describe the latest edition of a book is:
a new edition of the book
You might use another when comparing two different editions of the same book:
I bought a new copy of A Study in Scarlet.
Really? I thought you already owned that book.
I do, but this was another edition.
It's harder to use further, because, in the context of publishing, I would interpret further to mean:
further (adj.) additional to what already exists or has already taken place or been done
(from NOAD)
However, I suppose we could:
The publisher has indicated a reluctance to print any further editions of this book.
In that last sentence, the adjectives new or more could work in place of further.
Shore
(Oxford definition) The land along the edge of the sea or ocean, a lake or another large area of water.
(Merriam Webster definition) Strip of land where the sea meets the land.
Shoreline
(Oxford definition) The edge of the sea, the ocean or a lake.
(Merriam Webster definition) Strip of land where the sea meets the land.
From dictionary definition it might mean that they are similar, but in reality or in actual ocean terminology they are not similar.
(From coastal wiki) The intersection between the mean high water line and the shore.
Beach
(Merriam Webster definition) Area where the land meets the sea; its features vary depending on climate, wind, sea and the type of rocks of which it is composed.
(Oxford definition) An area of sand or small stones (called shingles) beside the sea or a lake.
So a beach and a shore are the same.
Coast
(Oxford definition) The land beside or near to the sea or ocean
(From coastal wiki) The strip of land that extends from the coastline inland to the first major change in the terrain features, which are not influenced by the coastal processes. The main types of coastal features are dunes, cliffs and low-lying areas, possibly protected by dikes or seawalls.
Please refer the picture for better understanding.
Coastline
(Oxford definition) The land along a coast, especially when you are thinking of its shape or appearance.
(From coastal wiki) Technically the line that forms the boundary between the COAST and the SHORE, i.e. the foot of the cliff or the foot of the dunes. Commonly, the line that forms the boundary between the land and the water.
Again have a look at this picture for better understanding.
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Usage Note from Advanced Learner's Dictionary
Best Answer
A connotation can just be an idea that we associate with another word, phrase or sentence. So for example the phrase bucket and spade will have connotations of beaches, sunshine, childhood, seaside holidays and so forth. If you're writer and you want to talk about a grave-robber stealing a body from a cemetery, you probably won't want to say:
There's nothing wrong with the grammar of this sentence, but when you say bucket and spade it might make people think about happy things, not grave, serious and scary ones. It's probably important for your story for people to be a little bit scared, not happy and comfortable. Notice that nobody would think that the grave-robber was at the beach in that sentence. It is just that using that phrase will make people think about beaches for a second.
An implication is something slightly different. If I imply something, I am saying something specific to somebody, without actually using that sentence (this might be an accident. We might not want the listener to have this idea). Usually, an implication is a proposition - something that can be expressed as a sentence. So for example, if I say:
... then I am implying that:
But notice that I did not say that. That second sentence is not part of what I said. If I am a mean and horrible person, I may have deliberately tricked you. But I did not lie. The truth may well be that:
The reason might be for example, that you are not allowed ice-cream because you're allergic to dairy products. Notice that if I say the whole of the last example, the implication is cancelled. We no longer think that the speaker will give any ice-cream to anyone if the homework is done. We can cancel implications easily. It is difficult to cancel connotations. We may still be reminded of something, like holidays, for example, even if the actual word or phrase is being used in a completely different way.
Conclusion
In the normal uses of these words, a connotation is an association that we have with a word, phrase or sentence. It is not necessarily a proposition. It is not usually the kind of idea we can express in a sentence.
In contrast, an implication is usually a proposition. It is an idea we could express as a sentence. Sometimes the listener may want us to understand this proposition. Sometimes it may be accidental. We can cancel implications. It is difficult, if not impossible sometimes, to cancel connotations.