completist

As nouns the difference between completist and completionist

is that completist is a collector who strives to obtain a complete collection of some type of thing or completist can be a person who champions any philosophy which somehow includes the completeness of something; as, a completist philosopher who holds that a definite complete body of knowledge exists to be discovered while completionist is one who insists on completion.

As an adjective completist

is which attempts to collect something completely or completist can be (obsolete).

is likely misspelled.

has no English definition.

As a noun completist

is a collector who strives to obtain a complete collection of some type of thing.

As an adjective completist

is which attempts to collect something completely.

As adjectives the difference between completest and completist

is that completest is superlative of complete while completist is which attempts to collect something completely.

As a verb completest

is archaic second-person singular of complete lang=en.

As a noun completist is

a collector who strives to obtain a complete collection of some type of thing.

As nouns the difference between completist and completism

is that completist is a collector who strives to obtain a complete collection of some type of thing or completist can be a person who champions any philosophy which somehow includes the completeness of something; as, a completist philosopher who holds that a definite complete body of knowledge exists to be discovered while completism is a desire to obtain a complete collection of some type of thing.

As an adjective completist

is which attempts to collect something completely or completist can be (obsolete).