As nouns the difference between diagrams and sketches
is that diagrams is plural of lang=en while sketches is plural of sketch.
As verbs the difference between diagrams and sketches
is that diagrams is third-person singular of diagram while sketches is third-person singular of sketch.
diagrams
English
Noun
(head)
Verb
(head)
(diagram)
----
sketches
English
Noun
(head)
Verb
(head)
(sketch)