Each of these three examples consists of two free morphemes which have been joined together to form a new lexeme / concept. Prototypically these will be noun + noun (N+N) compounds (e.g. keyboard), but other combinations are possible e.g. kick-off consisting of a verb / noun1 + preposition (V/N+P). Note also that the orthography of such compounds can vary, either being written as separate units, hyphenated or as one. (Unfortunately, there is no clear rule to predict the spelling, although there is a tendency for newer compounds to be written separately at first, later hyphenated, and then possibly becoming one unit after much use.)