spectral

Unsubstantial is a related term of spectral.

As adjectives the difference between unsubstantial and spectral

is that unsubstantial is (archaic) while spectral is having the appearance of a spectre; ghostly.

Spectral is a related term of unreal.

As adjectives the difference between spectral and unreal

is that spectral is having the appearance of a spectre; ghostly while unreal is fake; not real.

As an adjective spectral

is having the appearance of a spectre; ghostly.

As a noun null is

zero, nil; the cardinal number before einn.

As adjectives the difference between spectral and tasteless

is that spectral is having the appearance of a spectre; ghostly while tasteless is having no flavour; bland, insipid.

As an adjective spectral

is having the appearance of a spectre; ghostly.

As a noun spectroscopy is

(uncountable) the scientific study of spectra.

As a verb strive

is to try to achieve a result; to make strenuous effort; to try earnestly and persistently.

As a noun strive

is (obsolete) an effort; a striving.

As an adjective spectral is

having the appearance of a spectre; ghostly.

As adjectives the difference between spooky and spectral

is that spooky is eerie, or suggestive of ghosts or the supernatural while spectral is having the appearance of a spectre; ghostly.

As adjectives the difference between spectral and prismatic

is that spectral is having the appearance of a spectre; ghostly while prismatic is of or pertaining to a prism; having the form of a prism; containing one or more prisms.

As adjectives the difference between insubstantial and spectral

is that insubstantial is lacking substance; not real or strong while spectral is having the appearance of a spectre; ghostly.