Tense/Lax is not a phonological feature commonly used to describe sounds. It is a term used in phonetics to describe the degree of muscular tension in the vocal tract during the production of a sound.

Allophony refers to the systematic relationship between two or more sounds in a language, where they are considered variants of the same phoneme.

Assimilation is a phonological process where a sound changes to match the sound that follows it.

Elision refers to the loss of a sound in a particular context.

Vowel Systems is not a common typological classification of languages based on their phonological systems. It is a sub-category within the broader classification of Vowel Inventories.

Oligosynthetic Language refers to a language that has a relatively small number of phonemes.

Nasalization is not a common phonological feature used to describe vowels. It is a feature that is typically associated with consonants.

Polysynthetic Language refers to a language that has a relatively large number of phonemes.

Dissimilation is a phonological process where a sound changes to match the sound that precedes it.

Synthetic Language refers to a language that has a relatively moderate number of phonemes.

Height is not a common phonological feature used to describe consonants. It is a feature that is typically associated with vowels.

Polysynthetic Language refers to a language that has a relatively small number of syllables per word.

Dissimilation is a phonological process where two sounds change to make them more distinct.

Analytic Language refers to a language that has a relatively large number of syllables per word.

Metathesis is a phonological process where the order of two sounds changes.