Irregular
Part of speech: adjective
Definition: Nonstandard; not conforming to rules or expectations. Of a surface, rough.
Part of speech: noun
Definition: A soldier who is not a member of an official military force and, often, does not follow regular army tactics
Example sentence: I have an irregular heartbeat, so that means a fair amount of medication - and I have blood pressure pills, too, but no vitamins or supplements.
Temporary
Part of speech: adjective
Definition: For a limited time, ephemeral, not constant; transient
Part of speech: noun
Definition: One serving for a limited time; short-term employee.
Example sentence: Purity and simplicity are the two wings with which man soars above the earth and all temporary nature.