tightly fitting vs tight-fitting

tightly fitting and tight-fitting both are adjectives.

Word	Noun	Adjective	Verb	Adverb
tightly fitting	No	Yes	No	No
tight-fitting	No	Yes	No	No

As adjectives, tightly fitting and tight-fitting are synonyms defined as:

Other synonyms of tightly fitting include skinny, tight fitting, tightfitting.

tightly fitting (adjective)	tight-fitting (adjective)
fitting snugly	fitting snugly