flow chart vs flowchart

flow chart and flowchart both are nouns.

Word	Noun	Adjective	Verb	Adverb
flow chart	Yes	No	No	No
flowchart	Yes	No	No	No

As nouns, flow chart and flowchart are synonyms defined as:

flow chart and flowchart: a diagram of the sequence of operations in a computer program or an accounting system

Other synonyms of flow chart include flow diagram, flow sheet.

flow chart (noun)	flowchart (noun)
a diagram of the sequence of operations in a computer program or an accounting system	a diagram of the sequence of operations in a computer program or an accounting system