chockful vs cram full

chockful and cram full both are adjectives.

Word	Noun	Adjective	Verb	Adverb
chockful	No	Yes	No	No
cram full	No	Yes	No	No

As adjectives, chockful and cram full are synonyms defined as:

Other synonyms of chockful include chock-full, chockablock, choke-full, chuck-full.

chockful (adjective)	cram full (adjective)
packed full to capacity	packed full to capacity