SCLK vs spacecraft clock time

SCLK and spacecraft clock time both are nouns.

Word	Noun	Adjective	Verb	Adverb
SCLK	Yes	No	No	No
spacecraft clock time	Yes	No	No	No

As nouns, SCLK and spacecraft clock time are synonyms defined as:

SCLK and spacecraft clock time: the clock time given by a clock carried on board a spacecraft

SCLK (noun)	spacecraft clock time (noun)
the clock time given by a clock carried on board a spacecraft	the clock time given by a clock carried on board a spacecraft