irregular

Strange is a related term of irregular.

As a proper noun strange

is .

As an adjective irregular is

irregular.

Irregular is a synonym of unfitting.

As adjectives the difference between irregular and unfitting

is that irregular is irregular while unfitting is that is not fitting for its purpose.

As adjectives the difference between irregular and singular

is that irregular is irregular while singular is singular (linear algebra: of matrix: having no inverse).

As adjectives the difference between irregular and spurious

is that irregular is nonstandard; not conforming to rules or expectations while spurious is false, not authentic, not genuine.

As a noun irregular

is a soldier who is not a member of an official military force and, often, does not follow regular army tactics.

Irregular is a related term of volatile.

As adjectives the difference between irregular and volatile

is that irregular is irregular while volatile is (physics) evaporating or vaporizing readily under normal conditions.

Irregular is a synonym of haphazard.

As adjectives the difference between irregular and haphazard

is that irregular is irregular while haphazard is random; chaotic; incomplete; not thorough, constant, or consistent.

Irregular is a related term of convertible.

As adjectives the difference between irregular and convertible

is that irregular is irregular while convertible is able to be converted.

As a noun convertible is

a car whose roof can be removed or folded.

Irregular is a related term of counterfeit.

As adjectives the difference between irregular and counterfeit

is that irregular is irregular while counterfeit is false, especially of money; intended to deceive or carry appearance of being genuine.

As a noun counterfeit is

a non-genuine article; a fake.

As a verb counterfeit is

to falsely produce what appears to be official or valid; to produce a forged copy of.

As adjectives the difference between irregular and unnatural

is that irregular is nonstandard; not conforming to rules or expectations while unnatural is not natural; supernatural or artificial.

As a noun irregular

is a soldier who is not a member of an official military force and, often, does not follow regular army tactics.

Quixotic is a related term of irregular.

As adjectives the difference between quixotic and irregular

is that quixotic is possessing or acting with the desire to do noble and romantic deeds, without thought of realism and practicality; exceedingly idealistic while irregular is irregular.