• Supernovas may have much to do with the triggering of star birth.
• Closely allied ( or related , or connected ) to noise control is vibration control.
• The problem is closely allied to [ or connected ( or associated ) with] seepage control.
• Flow rate and pressure are closely ( inter ) linked [ or ( inter ) related] .
• The response to most compounds is closely related to the mass of ...
• Other auxiliary systems are intimately connected .
• Intimately related to the economics of the accelerators are the technological factors that ...
• Hemophilia is closely linked to colour blindness in some families.
• The electron is tightly bound to the atom.