Restrain is a related term of counteract.

As verbs the difference between restrain and counteract

is that restrain is   to control or keep in check while counteract is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

Happily is a synonym of dexterously.

As adverbs the difference between happily and dexterously

is that happily is (archaic) by chance; perhaps while dexterously is in a dexterous manner; skillfully; with precision; carefully.

Various is a related term of occasional.

As adjectives the difference between various and occasional

is that various is having a broad range (of different elements) while occasional is occurring or appearing irregularly from time to time.

As a determiner various

is more than one (of an indeterminate set of things).

Dark is a related term of somber.

As adjectives the difference between dark and somber

is that dark is having an absolute or (more often) relative lack of light while somber is dark or dreary in character; joyless, and grim.

As a noun dark

is a complete or (more often) partial absence of light.

As a verb somber is

.

Shatter is a related term of dislocate.

As verbs the difference between shatter and dislocate

is that shatter is to violently break something into pieces while dislocate is to put something out of its usual place.

As a noun shatter

is (archaic) a fragment of anything shattered.

Unpitying is a related term of implacable.

As adjectives the difference between unpitying and implacable

is that unpitying is not feeling or showing pity while implacable is unplaceable; that cannot be put or placed.

Addition is a related term of concomitant.

As nouns the difference between addition and concomitant

is that addition is addition while concomitant is something happening or existing at the same time.

As an adjective concomitant is

accompanying; conjoined; attending; concurrent.

Innocent is a related term of innoxious.

As adjectives the difference between innocent and innoxious

is that innocent is free from guilt, sin, or immorality while innoxious is having no harmful effect.

As a noun innocent

is those who are innocent; young children.

Sharper is a synonym of trickster.

As nouns the difference between sharper and trickster

is that sharper is (dated) a swindler; a cheat; a professional gambler who makes his living by cheating while trickster is a mythological figure responsible for teaching others through the use of guile and treason.

As an adjective sharper

is (sharp).

Ailing is a related term of indisposition.

As nouns the difference between ailing and indisposition

is that ailing is an ailment while indisposition is a mild illness, the state of being indisposed.

As a verb ailing

is .

As an adjective ailing

is sickly; sick; ill; unwell.