modernization
I would say your wallet would have to be bottomless.
economic obsolescence
Obsolescence is a noun.
obsolescene
Managerial Obsolescence is a situation where Managers cannot keep up with the latest technology or are not as well-qualified.
With the advent of the personal computer, the typewriter has been in obsolescence for many years.
Hannibal Navies was born on 1977-07-19.
The rise of modern steel navies from the 1890s through the 20th century.
yeah
One of the best sources for the study of obsolescence is the book "Strategies to the Prediction, Mitigation, and Management of Product Obsolescence" by Bjorn Bartels, et al. Check your local library or Google books to get a copy.
The plural form for the noun navy is navies; the plural possessive form is navies'.