preservation

As a noun preservation

is preservation.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As a noun preservation

is preservation.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between preservation and patronage

is that preservation is preservation while patronage is patronage.

As nouns the difference between heritage and preservation

is that heritage is heritage, inheritance, legacy while preservation is preservation.

As a noun preservation

is preservation.

As a verb communicate is

to impart.

As nouns the difference between resilience and preservation

is that resilience is resilience (the mental ability to recover quickly from depression, illness or misfortune) while preservation is preservation.

As nouns the difference between preservation and stabilization

is that preservation is preservation while stabilization is (uncountable) the process of stabilizing.

As a noun preservation

is preservation.

As a verb maintain is

(obsolete|transitive) to support (someone), to back up or assist (someone) in an action.

As nouns the difference between longevity and preservation

is that longevity is the quality of being long-lasting, especially of life while preservation is preservation.

As nouns the difference between preservation and progress

is that preservation is preservation while progress is movement or advancement through a series of events, or points in time; development through time.

As a verb progress is

to move, go, or proceed forward; to advance.