Shriveled/Shriveling vs. Shrivelled/Shrivelling
shriveled and shriveling in the U.S.; shrivelled and shrivelling outside the U.S.
Chute vs. shoot
Chute: 1. a trough, tube, or channel; 2. a waterfall; 3. a parachute. Shoot does not bear any of these senses.
Pair vs. pare vs. pear
Pair: a set of two. Pare: to trim. Pear: a fruit with a round base and a tapered top.
Home school vs. homeschool (vs. home-school)
The unhyphenated compound will someday prevail, but for now less risky writers are stuck with the two-word form, which is usually hyphenated as a verb.
Check in vs. Check-in (vs. Checkin)
The verb is two words, unhyphenated. As a noun and an adjective, it’s hyphenated.