concrete senses, with the latter having developed by figurative extension from the former. These include view, filter, structure and key. In English, many abstract nouns are formed by adding a suffix (-ness, -ity, -ion) to adjectives or verbs. Examples are happiness (from the adjective happy), circulation (from the verb circulate) and serenity (from the adjective serene). Alienable vs. inalienable nouns Some languages, such as the Awa language spoken in Papua New Guinea, refer to nouns differently, depending on how ownership is being given for the given noun. This can be broken into two categories: alienable possession and inalienable possession. An alienably possessed noun is something that can exist independent of a possessor: for example 'tree' can be possessed ('Lucy's tree') but need not be ('the tree'), and likewise for 'shirt' ('Mike's shirt', 'that shirt') and 'roads' ('London's roads', 'those roads') . Inalienablly possessed nouns, on the other hand, refer to something that does not exist independently of a possessor; this includes kin terms such as 'father', body-part nouns such as 'shadow' or 'hair', and part-whole nouns such as 'top' and 'bottom'. Noun phrases A noun phrase is a phrase based on a noun, pronoun, or other noun-like words (nominal) optionally accompanied by modifiers such as determiners and adjectives. A noun phrase functions within a clause or sentence in a role such as that of subject, object, or complement of a verb or preposition. For example, in the sentence "The black cat sat on a dear friend of mine", the noun phrase the black cat serves as the subject, and the noun phrase a dear friend of mine serves as the complement of the preposition on. Nouns in relation to other word classes Pronouns Nouns and noun phrases can typically be replaced by pronouns, such as he, it, she, they, these which, and those, in order to avoid repetition or explicit identification, or for other reasons. For example, in the sentence Gareth thought that he was weird, the word "he" is a pronoun standing in place of the person's name. The word one can replace parts of noun phrases, and it sometimes stands in for a noun. An example is given below: But one can also stand in for larger parts of a noun phrase. For example, in the following example, one can stand in for new car. Nominalization Nominalization is a process whereby a word that belongs to another part