Synonyms of the word

infrared

• n. electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation,…
• adj. Having the wavelength in the infrared.
• adj. In the infrared spectrum.

frequence

• n. (obsolete) A crowd or throng; a concourse.
• n. (obsolete) frequency; abundance.

frequency

• n. (uncountable) The rate of occurrence of anything; the relationship between incidence and time period.
• n. (uncountable) The property of occurring often rather than infrequently.
• n. (statistics) number of times an event occurred in an experiment (absolute frequency).

invisible

• adj. Unable to be seen; out of sight; not visible.
• adj. Not appearing on the surface.
• adj. (Internet) Apparently, but not actually, offline.
• adj. (psychology) That is ignored by a person.
• v. To invisiblize.
• n. (obsolete) An invisible person or thing; specifically, God, the Supreme Being.
• n. (obsolete) A Rosicrucian; so called because avoiding declaration of his craft.
• n. (obsolete) One of those (as in the 16th century) who denied the visibility of the church.

oftenness

• n. (rare) The quality of happening often; frequency.

unseeable

• adj. invisible.
• adj. unimaginable.