Determine case online?

Question

Text Processing Automation

It is necessary to determine cases from several thousand words. I need this to filter out the nominative case from the list, for example, words such as equipment, services, constructions.
Word list example:

строительные 
строительное 
оборудование 
недвижимость 
конструкции 
санитарно 
машин 
техническое 
промышленные 
приспособления 
услуги 
оборудования 
аренда 
здания 
строительных 
дизайн 
строительство 
материалы 
сырье 
модульные 
архитектура 
изделия

Is there such a service on the network that will somehow help me in my task?

Answer 1

Constructions are both the nominative plural and the genitive, dative and prepositional singular.
Services, buildings, products, devices - similarly.
To understand what kind of case is possible only in the context of the sentence.

Answer 2

For screening - use stemming
snowball.tartarus.org/algorithms/russian/stemmer.html
There are already implementations in different languages. You don't have to write yourself.

Answer 3

Solved with excel and case ending
formula