As an adjective activatable

is capable of being activated.

As a noun activatability is

the state of being activatable.

In chemistry terms the difference between dihydrochloride and hydrochloride

is that dihydrochloride is any hydrochloride formed by reaction with two molecules of hydrochloric acid while hydrochloride is a compound of hydrochloric acid with an organic base such as an amine.

As nouns the difference between hydroxyl and dihydroxylation

is that hydroxyl is (chemistry) a univalent radical or functional group (–oh) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds while dihydroxylation is (organic chemistry) the introduction of two hydroxyl groups into a molecule.

Dihydroxylation is a related term of hydroxylation.

In organic chemistry terms the difference between hydroxylation and dihydroxylation

is that hydroxylation is the introduction of a hydroxyl group into a molecule, especially by the replacement of a hydrogen atom while dihydroxylation is the introduction of two hydroxyl groups into a molecule.

As nouns the difference between kinase and dikinase

is that kinase is kinase while dikinase is (enzyme) any kinase that transfers two phosphate groups.

As nouns the difference between track and trackwork

is that track is a mark left by something that has passed along; as, the track, or wake, of a ship; the track of a meteor; the track of a sled or a wheel while trackwork is construction or maintenance of railroad tracks.

As a verb track

is to observe the (measured) state of an object over time.

As nouns the difference between athlete and steeplechaser

is that athlete is athlete while steeplechaser is a horse or human athlete who participates in steeplechase racing.

As nouns the difference between steeplechase and steeplechaser

is that steeplechase is (chiefly|british) a horse race, either across open country, or over an obstacle course while steeplechaser is a horse or human athlete who participates in steeplechase racing.

As nouns the difference between horse and standardbred

is that horse is a poker variant consisting of five different poker variants, with the rules changing from one variant to the next after every hand or horse can be (variant of basketball) while standardbred is (horse racing) a breed of horse bred specifically for harness racing.

Sendee is a synonym of recipient.

As nouns the difference between recipient and sendee

is that recipient is one who receives, such as one who receives money or goods while sendee is a person to whom something is sent.