adoption noun 1. fostering, adopting, taking in, fosterage noun 2. embracing, choice, taking on, taking up, support, taking over, selection, approval, following, assumption, maintenance, acceptance, endorsement, appropriation, ratification, approbation, espousal

adoption - the act of accepting with approval; favorable reception; "its adoption by society"; "the proposal found wide acceptance" acceptance, acceptation, espousal embrace, bosom - a close affectionate and protective acceptance; "his willing embrace of new ideas"; "in the bosom of the family" approval, approving, blessing - the formal act of approving; "he gave the project his blessing"; "his decision merited the approval of any sensible person" 2. adoption - a legal proceeding that creates a parent-child relation between persons not related by blood; the adopted child is entitled to all privileges belonging to a natural child of the adoptive parents (including the right to inherit) legal proceeding, proceeding, proceedings - (law) the institution of a sequence of steps by which legal judgments are invoked law, jurisprudence - the collection of rules imposed by authority; "civilization presupposes respect for the law"; "the great problem for jurisprudence to allow freedom while enforcing order" 3. adoption - the appropriation (of ideas or words etc) from another source; "the borrowing of ancient motifs was very apparent" borrowing appropriation - a deliberate act of acquisition of something, often without the permission of the owner; "the necessary funds were obtained by the government's appropriation of the company's operating unit"; "a person's appropriation of property belonging to another is dishonest" naturalisation, naturalization - changing the pronunciation of a borrowed word to agree with the borrowers' phonology; "the naturalization in English of many Italian words" misappropriation - wrongful borrowing; "his explanation was a misappropriation of sociological theory" crossover - the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience; "a jazz-classical crossover album" Source: www.thefreedictionary.com

Hello Miss Trendy, Do you mean "adoption" in the sense of parents adopting children not related by blood? If so then here are some words: Second birth, new life, citizenship papers, adoption agency, parenting, societal recognition , contract , parental responsibilities , abandoned children, orphanage, adopter, waif, illegitimate , indigent children ,baby broker, child-caring arrangement , biological strangers.... These were some words to the previous mentioned meaning , if you mean on the other hand by adoption the acquisition of words or ideas from another source let me know ;)