pct vs absentee rate

pct and absentee rate both are nouns.

Word	Noun	Adjective	Verb	Adverb
pct	Yes	No	No	No
absentee rate	Yes	No	No	No

As nouns, absentee rate is a hyponym of pct; that is, absentee rate is a word with a more specific, narrower meaning than pct:

pct: a proportion in relation to a whole (which is usually the amount per hundred); ten percent
absentee rate: the percentage of workers who do not report to work

Other hyponyms of pct include occupancy rate, vacancy rate, unemployment rate.

pct (noun)	absentee rate (noun)
a proportion in relation to a whole (which is usually the amount per hundred); ten percent	the percentage of workers who do not report to work