monoamine vs aminoalkane

monoamine and aminoalkane both are nouns.

Word	Noun	Adjective	Verb	Adverb
monoamine	Yes	No	No	No
aminoalkane	Yes	No	No	No

As nouns, aminoalkane is a hypernym of monoamine; that is, aminoalkane is a word with a broader meaning than monoamine:

monoamine: a molecule containing one amine group (especially one that is a neurotransmitter)
aminoalkane: a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals

Other hypernyms of monoamine include amine.

monoamine (noun)	aminoalkane (noun)
a molecule containing one amine group (especially one that is a neurotransmitter)	a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals