Whitweek vs Whitsuntide

Whitweek and Whitsuntide both are nouns.

Word	Noun	Adjective	Verb	Adverb
Whitweek	Yes	No	No	No
Whitsuntide	Yes	No	No	No

As nouns, Whitweek and Whitsuntide are synonyms defined as:

Whitweek and Whitsuntide: Christian holiday; the week beginning on Whitsunday (especially the first 3 days)

Other synonyms of Whitweek include Whitsun.

Whitweek (noun)	Whitsuntide (noun)
Christian holiday; the week beginning on Whitsunday (especially the first 3 days)	Christian holiday; the week beginning on Whitsunday (especially the first 3 days)