cheer vs jolly up

cheer is a noun but jolly up is not a noun.

Word	Noun	Adjective	Verb	Adverb
cheer	Yes	No	Yes	No
jolly up	No	No	Yes	No

As verbs, cheer and jolly up are synonyms defined as:

Other synonyms of cheer include cheer up, jolly along.

cheer (noun)	jolly up (noun)
the quality of being cheerful and dispelling gloom
a cry or shout of approval

cheer (verb)	jolly up (verb)
become cheerful	cause (somebody) to feel happier or more cheerful
spur on or encourage especially by cheers and shouts
show approval or good wishes by shouting
cause (somebody) to feel happier or more cheerful
give encouragement to