Semen Analysis -- Helpful Details

Tapered refers to the head of the sperm, I found several references that mention testicular heat as a possible contributor to this defect:
Men with an elevated testicular temperature frequently due to a varicocele or exposure to excessive heat often have tapered sperm quality and may be missing the acrosome, the packet of enzymes at the tip of the sperm head that allow the sperm to bore through the coating of the egg.
From: An in-depth look at fertility

I also found this article: Deterioration Of Sperm Morphology In Men Exposed To High Temperature

Forward progression has to do with how well the sperm are at swimming forward. I don't know much about it but Vitamin E and Selenium are supposed to help with motility

Hypoosmolarity has to do with too much water being in the sperm cell I believe, remember osmosis from biology class in high school? I couldn't find anything that directly spoke to directly this but this quote points out some possible things to research more on:
In mammalian cells, hydration may change dynamically in response to hormones, ethanol, aniso-osmotic environments, oxidative stress or by cumulative substrate uptake.
from: Hepatocellular hydration: signal transduction and functional implications.

Here's a comprehensive guide to refer to: Semen Analysis in the Clinical Evaluation of Infertility