Bas-

base, basic, basement, bass, baseball

Cap-

capable, capsule, capture, captain, capital

Cred-

credential, credit, credible, creditor, incredible 

Dict-

addiction, dictionary, dictator, predict, contradict

Duc, Duct

Induct, introduction, induce, aqueduct, conduct, aubduct

Fac, Fact-

face, factors, factory, artifact 

Graph-

polygraph, biography, geography, graphic, autograph, graphite

Log-

monologue, logic, apolog, biology, dialog

Mort- 

mortality, mortify, mortal, mortician, immortal

Scrib, Script-

transcribe, subscription, scribble, scribe 

Spec, Spect-

perspective, aspect, respect, prospect, spectrum