plastic blow molding machine vs plastic blow moulding machine

plastic blow molding machine and plastic blow moulding machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
plastic blow molding machine	Yes	No	No	No
plastic blow moulding machine	Yes	No	No	No

As nouns, plastic blow molding machine and plastic blow moulding machine are synonyms defined as:

plastic blow molding machine and plastic blow moulding machine: a machine that forms hollow plastic parts.

Other synonyms of plastic blow molding machine include blow molding machine, blow moulding machine.

plastic blow molding machine (noun)	plastic blow moulding machine (noun)
a machine that forms hollow plastic parts.	a machine that forms hollow plastic parts.