Learn English – the difference between “stressed” and “stressful”

The two adjectives stem from the same verb, but they are not quite interchangeable.

Dominating, when used as an adjective, is about winning. A dominating person likes to assert their authority, win every argument, and treat colleagues poorly. In the example sentence, dominating is a good fit, because it explains why Miss Wilson would be unliked by colleagues.

Dominant, on the other hand, means "playing a primary role". Example usages:

• Humans are mostly right-handed. However, in lobsters, the left and right claws are equally likely to be the dominant claw.

  It is not the case that one claw is subjugating the other, so dominating would not be appropriate here at all.

• Since the gene that leads to round peas is dominant, you cannot easily predict whether a pea plant bred from two round pea plants will have round or wrinkled peas.

  The opposite of a recessive gene is a dominant gene. That's just the accepted terminology.

• The young lion was gravely injured while challenging the dominant male.

  Although the alpha male undoubtedly has a dominating personality like Miss Wilson, that is not relevant. Rather, we are talking about the fight to occupy the primary social role in the pride of lions.

That said, there are situations where either word could be acceptable. For example,

• As n grows large, we can approximate 5n² + n + 1 as 5n², since 5n² is the __________ term.

  It's both the term of primary importance and the term that dwarfs all others, so either dominant or dominating could work, interchangeably.

• Sigmund Freud has long been the dominant figure in the field of psychoanalysis, even though his ideas had little scientific backing.

  For whatever reason, his work was generally held in high regard.

  Sigmund Freud has long been a dominating figure in the field of psychoanalysis, even though his ideas had little scientific backing.

  With this substitution, there is a change in meaning. Now, it sounds like all other researchers felt intimidated or outcompeted by Freud.

They have similar meanings, but they are not used in the same semantic contexts, and they cannot both be used in all the same syntactic contexts.

• solo is mostly used to speak only of actions; alone is also used to speak of anything physically isolated.

• solo can be used as a noun ("a drum solo") or verb ("Rich soloed the third chorus"); alone cannot.

• solo is used as an attributive adjective before its head noun ("a solo performance"); alone is used as an attributive adjective after its head ("John alone was successful").

• alone can be used as an adjectival predicate complement ("Amy was now alone"); solo is very rarely used this way.

It is really only as adverbs that their uses overlap: "John acted alone", "John acted solo".