extant

As adjectives the difference between extant and viable

is that extant is still in existence while viable is able to live on its own (as for a newborn..

As adjectives the difference between extant and possible

is that extant is still in existence while possible is able but not certain to happen; neither inevitable nor impossible.

As a noun possible is

a possible one.

As adjectives the difference between extant and unquenched

is that extant is still in existence while unquenched is not quenched.

As an adjective extant

is still in existence.

As a noun force is

force.

As a noun sextant

is a navigational device for deriving angular distances between objects so as to determine latitude and longitude.

As a proper noun Sextant

is the constellation Sextans.

As an adjective extant is

still in existence.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective extant is

still in existence.

As an adjective extant is

still in existence.

As adjectives the difference between actual and extant

is that actual is existing in act or reality, not just potentially; really acted or acting; occurring in fact while extant is still in existence.

As a noun actual

is an actual, real one; notably:.

As adjectives the difference between extant and extirpated

is that extant is still in existence while extirpated is (of a species) locally extinct (though alive elsewhere).

As a verb extirpated is

(extirpate).