flow diagram vs flow chart

flow diagram and flow chart both are nouns.

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

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

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

Other synonyms of flow diagram include flow sheet, flowchart.

flow diagram (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