1. Allure (noun)
Meaning: the quality of being powerfully and mysteriously attractive or fascinating.
Synonyms: attraction, lure
Antonyms: repulsion
Example Sentence: people for whom gold holds no allure
2. Sporadic (adjective)
Meaning: occurring at irregular intervals or only in a few places; scattered or isolated.
Synonyms: occasional, infrequent
Antonyms: common, constant
Example Sentence: To be sure, there are some sporadic efforts, mere reiterations.
3. Incandescent (adjective)
Meaning: emitting light as a result of being heated.
Synonyms: luminous, radiant
Antonyms: dark, dim
Example Sentence: When anything becomes hot enough to glow, we say it is incandescent.
4.Rudimentary (adjective)
Meaning: involving or limited to basic principles.
Synonyms: elemental, elementary
Antonyms: complex, complicated
Example Sentence: After all, these are forms, the most rudimentary forms, of the scientific spirit.