As nouns the difference between permanency and sojourn

is that permanency is the state or quality of permanence while sojourn is a short stay somewhere.

As a verb sojourn is

to reside somewhere temporarily, especially as a guest or lodger.

As nouns the difference between tenure and prevalence

is that tenure is a status of possessing a thing or an office; an incumbency while prevalence is the quality or condition of being prevalent; wide extension.

As a verb tenure

is to grant tenure, the status of having a permanent academic position, to (someone).

As nouns the difference between singularity and void

is that singularity is the state of being singular, distinct, peculiar, uncommon or unusual while void is an empty space; a vacuum or void can be .

As an adjective void is

containing nothing; empty; vacant; not occupied; not filled.

As a verb void is

(label) to make invalid or worthless.

As nouns the difference between blackhole and void

is that blackhole is , especially in the attributive while void is an empty space; a vacuum or void can be .

As verbs the difference between blackhole and void

is that blackhole is (internet) to redirect (network traffic, etc) nowhere; to discard incoming traffic while void is (label) to make invalid or worthless.

As an adjective void is

containing nothing; empty; vacant; not occupied; not filled.

As verbs the difference between eliminates and remove

is that eliminates is while remove is (label) to move something from one place to another, especially to take away.

As a noun remove is

the act of removing something.

As a verb loll

is to act lazily or indolently; to recline; to lean; to throw one's self down; to lie at ease.

As an adjective phlegmatic is

not easily excited to action or passion; calm; sluggish.

As a noun phlegmatic is

one who has a phlegmatic disposition.

As adjectives the difference between somnolent and phlegmatic

is that somnolent is drowsy or sleepy while phlegmatic is not easily excited to action or passion; calm; sluggish.

As a noun phlegmatic is

one who has a phlegmatic disposition.

As adjectives the difference between informative and enlightened

is that informative is providing information; especially , providing useful or interesting information while enlightened is educated or informed.

As a noun enlightened is

someone who has been introduced to the mysteries of some activity, religion especially buddhism.

As a verb enlightened is

(enlighten).

As nouns the difference between merch and product

is that merch is (lb) merchandise while product is a commodity offered for sale.

As nouns the difference between barnacle and anemone

is that barnacle is a marine crustacean of the subclass cirripedia that attaches itself to submerged surfaces such as tidal rocks or the bottoms of ships while anemone is (label).

As a verb barnacle

is to connect with or attach.