absentee rate vs pct

absentee rate and pct both are nouns.

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

As nouns, pct is a hypernym of absentee rate; that is, pct is a word with a broader meaning than absentee rate:

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

Other hypernyms of absentee rate include per centum, percent, percentage.

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