Opposite doesn't mean completely different, it means the antithesis of.
Dark is the opposite of light. It isn't merely different from light, it is defined as the absence of light. The word "dark" literally means, "not light."
The moon is completely different from a frog, but they're not really opposites of each other. The moon is not a frog, granted, but it isn't defined by being not a frog. Its definition has no relationship to a frog, so it isn't the opposite of a frog. Likewise, its definition has no relationship to light or dark, which is why it isn't the opposite of those things, despite being completely different from them too.
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They attract each other. Thus the saying, 'opposites attract'
Most likely because they're the same weight. Objects can have completely different masses and have the same weight.
I can't be sure of exactly what you mean when you say "different". -- The two objects attract each other if their charges have opposite signs. -- They repel each other if their charges both have the same sign. These statements are both true whether or not the charges on the two objects have the same or different magnitudes.
they are both they same where as opposites attract like repel
Two objects with opposite charges are attracted to each other. Two objects that are of like charge will repel each other.
Coral is a physical object, and physical objects do not have opposites.
Nouns describing objects do not have opposites. "Unncumbered" is the opposite of "burdened" (if by luggage you mean something that is a burden)
Calculators do not have opposites because they are inanimate objects that serve a unique purpose (to answer math questions).
You can have an opposite of a property, such as "big", "fast", "silly", but in most cases it doesn't make much sense to talk about opposites of objects.
Most words do not have antonyms. Concrete objects are especially unlikely to have opposites. 'Homestead' has no opposite.
There is no such thing. It makes sense to talk about opposites of simple properties (adjectives), such as "fast", "clever", etc.; in general, it doesn't make so much sense to talk about the opposites of objects (nouns).
This user would say it isn't, since to linger is to stay longer, while to maintain, is to keep longer. You might say they have different objects (or subjects), but are not opposites. A better opposite of maintain (as in "maintain control") might be to lose, and you could oppose linger with to leave.
Antonym means opposite, and not all things have opposites. Astronomy is the study of celestial objects, and you can't really anti-study anything. The most you can do is simply to ignore it. But study and not-study aren't opposites.
They attract each other. Thus the saying, 'opposites attract'
An antonym is an opposite, and while reptiles and amphibians are very different they can't be considered opposites because not every aspect of them are opposites. For example, there are both reptiles and amphibians that lay eggs. Generally, there are no antonyms for nouns (objects/organisms). Antonyms are most often used with adjectives, adverbs and verbs. Ex: dirty/clean
Opposites attract
Since a Galaxy is a system of stars, planets, and other celestial bodies, The opposite might be a single celestial body, such as one planet.Another reply: The concept of "opposite" makes sense for simple properties, such as "big" being the opposite of "small", or "high" the opposite of "low". It doesn't make sense to speak of opposites of complex objects, such as humans, galaxies, etc.