As nouns the difference between connection and linking

is that connection is (uncountable) the act of connecting while linking is linkage.

As a verb linking is

present participle of link.

As an adjective linking is

serving to connect other things together.

As adjectives the difference between impressive and eponymous

is that impressive is making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene while eponymous is of, relating to, or being the person or entity after which something or someone is named.

As nouns the difference between close and intimacy

is that close is an end or conclusion or close can be an enclosed field while intimacy is feeling or atmosphere of closeness and openness towards someone else, not necessarily involving sexuality.

As a verb close

is (label) to remove a gap.

As an adjective close

is closed, shut.

As adjectives the difference between unactive and unactivated

is that unactive is not active; inactive while unactivated is not (yet) activated.

As an adjective obsolete is

obsolete, deprecated (computing).

As an adjective unactive

is not active; inactive.

As a verb deactivate is

(ergative) to make something inactive or no longer effective.

Unactivate is likely misspelled.

Unactivate has no English definition.

As a verb deactivate is

to make something inactive or no longer effective.

As an adjective unactivated

is not (yet) activated.

As a verb deactivated is

past tense of deactivate.

As a noun spunk

is a spark.

As a verb spunk

is to ejaculate.

As an adjective feisty is

tenacious, energetic, spunky.

As nouns the difference between complications and complexity

is that complications is while complexity is (uncountable) the state of being complex; intricacy; entanglement.