composition vs genotype

composition and genotype both are nouns.

Word	Noun	Adjective	Verb	Adverb
composition	Yes	No	No	No
genotype	Yes	No	No	No

As nouns, genotype is a hyponym of composition; that is, genotype is a word with a more specific, narrower meaning than composition:

Other hyponyms of composition include structure, phenotype, genetic constitution, grain, texture, karyotype.

composition (noun)	genotype (noun)
the act of creating written works	the particular alleles at specified loci present in an organism
musical creation	a group of organisms sharing a specific genetic constitution
something that is created by arranging several things to form a unified whole
the way in which someone or something is composed
the spatial property resulting from the arrangement of parts in relation to each other and to the whole
an essay (especially one written as an assignment)
a musical work that has been created
art and technique of printing with movable type
a mixture of ingredients