"Between" is a preposition. To give a rough definition, if A, B, and C are objects, and the following conditions are met, then B can be said to be between A and C: the shortest path from A to C intersects B; the distance from A to B is less than the distance from A to C; and the distance from B to C is less than the distance from A to C. It is generally considered improper to end a sentence with a preposition, though English lacks a formal rule forbidding it. Other prepositions include "of" and "to."
It depends on the context. In the context of "a teardrop came from her eye", it is one word. In the context of "he watched the tear drop to the floor", it is two words.
In the context "this setup works great!", it is one word. In the context "I have to set up the table still", it is two words. In the context, "it was a set-up, I am innocent!", it is hyphenated.
In the context of "overall the service was good", it is one word. In the context of "he chose this one over all the rest", it is two words.
An estimate is one, particularly when there are facts or figures. Another word would be a hypothesis, and it is used more in a scientific context.
It can be either, depending on context. Birdbath, as an object, is one word, a bird taking a bath would be two words
People would use the word "revealing" in a present tense. For example, Austin, "I am revealing my greatest weakness." This would mean he is speaking in present tense.
It is one word, lunchtime (midday mealtime).
Used in the context "these landforms are ancient", it is one word. Used in the context "and because of this, the land forms around the lake", it is two words.
Depends on the context. In mathematics it would be translation. In sociology or ethnology, migration or nomadic. In employment, peripatetic.
A number of things. Supplying some context would help us guess which one you mean.
one word meaning lacking detail depending on the context of its use would be "spacey." as in "that explanation was kinda spacey." ~VAGUE is a good word meaning "Lacking Detail"~
One can approach many sources to first define the word aminoglycosides. One considerable source could be Wikipedia which would also give more than the definition such as the context and history of the word.