Imaginable is an antonym of inexcogitable.

As adjectives the difference between imaginable and inexcogitable

is that imaginable is able to be imagined; conceivable while inexcogitable is (obsolete) unimaginable; unable to be imagined; inconceivable or mind-boggling; beyond belief; unthinkable.

Inexcogitable is a related term of unimaginability.

As a noun unimaginability

is the quality of being unimaginable.

As an adjective inexcogitable is

unimaginable; unable to be imagined; inconceivable or mind-boggling; beyond belief; unthinkable.

As an adjective incremental

is incremental.

As a noun incrementality is

the property or characteristic of being incremental.

As nouns the difference between increment and incrementality

is that increment is the action of increasing or becoming greater while incrementality is the property or characteristic of being incremental.

As a verb increment

is to increase by steps or by a step, especially by one.

As an adjective ceremonial

is ceremonial.

As a noun tipstaff is

a ceremonial staff, with a metal tip, carried by a constable or bailiff etc as a sign of office.

As nouns the difference between reef and phytoherm

is that reef is hoop (metal band on a barrel) while phytoherm is (geology|biology) a calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.

As an adjective autochthonous

is native to the place where found; indigenous.

As a noun phytoherm is

a calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.

As nouns the difference between petrification and phytoherm

is that petrification is petrification, petrifaction while phytoherm is (geology|biology) a calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.

As nouns the difference between bryophytes and phytoherm

is that bryophytes is while phytoherm is (geology|biology) a calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.

As a verb funghi

is .

As a noun phytoherm is

(geology|biology) a calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.