flow diagram vs flow sheet

flow diagram and flow sheet both are nouns.

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

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

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

Other synonyms of flow diagram include flow chart, flowchart.

flow diagram (noun)	flow sheet (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