1. One pretending to perfection; one who believes in the attainability of moral perfection.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• perfectionise,
• perfectionests,
• perfectioning,
• perfectinist,
• prefectionist,
• perfectionaist,
• perfectionis,
• profectionist,
• perfectionstist,
• perfectioist,
• perfectionnist,
• perfectionisth,
• perfectiosist,
• perfectionest,
• perfectionsit,
• perfectonist,
• perfectiionist,
• perfecionist,
• perfectoinist,
• perfectinoist

• perfect pitch,
• perfect game,
• perfectibility,
• perfectability,
• perfectible,
• perfectionism,
• perfective,
• perfect gas,
• perfective tense,
• perfect tense,
• perfection.

The adjective form of the word "perfectionist" is "perfectionistic".

The plural of the "perfectionist" can be the "perfectionists".

The singular of the "perfectionist" can be the "perfectionist".