Moreso or More so

"Moreso" and "more so" are both adverbs used to indicate a greater degree or extent. They are often used interchangeably to emphasize an increase in intensity, with "moreso" being less common and viewed by some as incorrect.

Moreso:

Moreso is not as common as more so, and is still seen by some as an invalid variant of more so.

Moreso started to gain popularity, starting from the 20th century, and is becoming a more widely accepted term, but its use should still be avoided in formal discourse and works.

More So:

More so is a frequently used adverbial phrase. It is also employed to emphasize a degree or extent, often in comparisons. more so means "to a greater extent" or "more in that way." The word more so is considered grammatically correct, so it should be used instead of moreso in formal settings.

Examples:

The new software is faster and more so user-friendly than the previous version.
I appreciate your help, and I value your friendship even more so.

Common Idioms/Phrases:

While neither moreso nor more so are idiomatic themselves, they are often used to enhance the emphasis in various expressions:

All the more so: Used to emphasize something to a greater degree.
Example: "His commitment to the cause made him an excellent leader, and all the more so because he faced numerous challenges."

Synonyms:

These adverbs share synonyms that can be interchanged depending on the context:

Furthermore: Used to introduce additional information or emphasize a point.
- Example: "She was an excellent athlete, and furthermore, she excelled in academics."
Moreover: Used to add more information or strengthen a preceding statement.
- Example: "The restaurant not only had great food but was also reasonably priced. Moreover, the service was exceptional."

How to Differentiate the Two Words:

The primary difference between moreso and more so lies in their spelling. Moreso is a single word used as an adverb, while more so consists of two separate words also functioning as an adverbial phrase.

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