launch pad vs launching pad

launch pad and launching pad both are nouns.

Word	Noun	Adjective	Verb	Adverb
launch pad	Yes	No	No	No
launching pad	Yes	No	No	No

As nouns, launch pad and launching pad are synonyms defined as:

launch pad and launching pad: a platform from which rockets or space craft are launched

Other synonyms of launch pad include launch area, launchpad, pad.

launch pad (noun)	launching pad (noun)
a platform from which rockets or space craft are launched	a platform from which rockets or space craft are launched