As pronouns the difference between anyone and whoever

is that anyone is any person; anybody while whoever is whatever person or persons.

As an adverb whoever is

An emphatic form of who.

As adverbs the difference between anymore and again

is that anymore is alternative form of lang=en while again is back in the reverse direction, or to an original starting point.

As a preposition again is

against.

As an adverb any

is to even the slightest extent, at all.

As a determiner any

is at least one; of at least one kind one at all.

As a pronoun any

is any thing(s) or person(s).

As a numeral set is

seven.

As adjectives the difference between anxious and sick

is that anxious is full of anxiety or disquietude; greatly concerned or solicitous, especially respecting something future or unknown; being in painful suspense;—applied to persons; as, anxious for the issue of a battle while sick is in poor health.

As a noun sick is

sick people in general as a group.

As a verb sick is

to vomit or sick can be (rare).

As a noun anxiety

is an unpleasant state of mental uneasiness, nervousness, apprehension and obsession or concern about some uncertain event.

As an adjective impatient is

impatient.

As nouns the difference between anxiety and doubt

is that anxiety is an unpleasant state of mental uneasiness, nervousness, apprehension and obsession or concern about some uncertain event while doubt is uncertainty, disbelief.

As a verb doubt is

to lack confidence in; to disbelieve, question, or suspect.

As a proper noun ants

is .

As a noun beetles is

.

As a verb beetles is

(beetle).

As a noun antonymy

is (semantics) the semantic relation between antonyms; the quality of being antonymous.

As a verb sturian is

to disturb.

As nouns the difference between antlers and spikes

is that antlers is plural of lang=en while spikes is plural of lang=en.

As a verb spikes is

third-person singular of spike.

As nouns the difference between antiseptics and sepsis

is that antiseptics is while sepsis is (pathology) a serious medical condition in which the whole body is inflamed, and a known or suspected infection is present.