dripping pan vs drip pan

dripping pan and drip pan both are nouns.

Word	Noun	Adjective	Verb	Adverb
dripping pan	Yes	No	No	No
drip pan	Yes	No	No	No

As nouns, dripping pan and drip pan are synonyms defined as:

dripping pan and drip pan: pan for catching drippings under roasting meat

dripping pan (noun)	drip pan (noun)
pan for catching drippings under roasting meat	pan under a refrigerator for collecting liquid waste
	pan for catching drippings under roasting meat