flowchart vs flow chart

flowchart and flow chart both are nouns.

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

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

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

Other synonyms of flowchart include flow diagram, flow sheet.

flowchart (noun)	flow chart (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