Processes of word formation, word derivation, and inflection all fall under the scope of morphology. What is most striking about morphology from a comparative linguistic perspective is that human languages use dramatically different formal devices to solve some of the same conceptual needs. For example, some languages use prefixes to form plurals while others use suffixes. For even more convolutions of morphology, go to the morphosyntax pages. Russian has a rich system of cases and verbal conjugation, allowing for very free word order.
Adjectives agree with nouns in gender, number, and case.
Non-past conjugation of perfective verbs results in future tense, while the same conjugation of imperfective verbs results in present tense. Non-past conjugations indicate person and number. Past-tense conjugations show gender and number. For mutable words articulation on the base and inflection is characteristic, nominal inflections being joined only to bases ending in a consonant. This explains why nouns and adjectives which are recent additions to Russian and end in a vowel cannot be declined.