no
similar in meaning to each other
They are synonyms of each other. There is no difference.
They are not synonyms. In some situations they could be antonyms, but they are not really the opposite of each other.
To each other - neither.
The words are called synonyms.
A noun for "encounter" is "meeting." Other synonyms include "confrontation," "engagement," or "interaction," depending on the context in which the encounter occurs. Each term can convey a slightly different nuance related to the nature of the encounter.
Synonyms are words with similar meanings.
You can substitute words which are synonyms. They can be used in place of each other.
The verb "cleave" is the only English word with two synonyms which are antonyms of each other: adhere and separate.
The idea to consider human nature and nature itself as separate entity is a philosophical question. Some philosophers have argued that human nature is nature in itself. If divided, then they do not oppose each other because they are one nature.
A thesaurus will give antonyms and synonyms.
Synonyms for "succeed" include achieve, accomplish, thrive, and prevail. Other alternatives are prosper, attain, and triumph. Each of these words conveys a sense of reaching a desired goal or outcome.