Pluto in 10th House synastry relationships are based on mutual penetration into the subtleties of political, professional, and business life. The “Plutonian” personality has a powerful transformational influence on the career of the Tenth House person whose positivity or negativity is determined by the characteristics of Pluto in the synastry.
In a positive scenario, they are characterized by high promising constructiveness in all spheres of joint life, especially professional ones. Their interest in the occult, reincarnation and religious philosophy help the partners achieve unexpected success in solving problems in science, politics, business. If they take classes on parapsychology, it may unexpectedly bring them even to such unadvertised topics as a secret scientific activity.
In a negative scenario, the mentioned tendencies become destructive and quickly ruin the relationship.
from F. Sakoyan, L. Ecker
Pluto in 10th House Synastry Explained
At first, it may seem to you that the presence of a Pluto in 10th House synastry partner either ruins all your plans, or at least spoils them greatly. However, much later, you will notice that the root of evil is still not in the partner but in you, more precisely, in the defects of your practical ethics and the system of proposals while the influence of a Pluto in Tenth House synastry partner is that he or she accelerates the collapse of your pre-doomed plans. Then and only then does it become possible to ineract constructively because this partner, like no one else (if he or she learns to pay attention to you and your circumstances), can see the defects of your choices and how inconsistent they are with your internal ethical system, even though you may not notice that youself.
A Pluto in 10th House synastry partner may seem like a rather difficult person, especially during showdowns when they point out to you the flaws of your future planning and also criticizes your choices from a spiritual point of view. They should learn to be as accurate and correct as possible in such discussions, otherwise you can completely remove them from your life. You need to be patient and tune in partly sacrificially because there is a certain grain of truth in what the partner claims, and it is better for you to arrange a little cleansing for yorself right on the spot, taking advantage of this excellent opportunity. However, the partner should not perceive your problems of choice as unrelated to him: after all, you are nothing but the partner’s mirror, and in this case a significant one, so all criticism addressed to you can relate back to a much greater extent; and if the Pluto in Tenth House synastry partner does not believe in it now, over time he or she runs the risk of getting tangible poof that hurts.
from A. Podvodny