They are alike because they both have the "n" sound as the beginning. KNit and GName but have the "nnn" sound.
The difference is the same sound is spelled differently. They both make the same nnn sound, but the first two letters are different.
Sigular
Nom - Nomus, Noma, Namum
Gen - Genus, Gena, Genum
Dat - Datus, Data, Datum
Acc - Accus, Acca, Accum
Abl - Ablus, Abla, Ablum
Plural
Nom - Nomuses, Nomas, Namumes
Gen - Genuses, Genas, Genumes
Dat - Datuses, Datas, Datumes
Acc - Accuses, Accas, Accumes
Abl - Abluses, Ablas, Ablumes<span />
Both nylon and polyester are durable and light-weight synthetic fibres with properties like stretch resistance, wrinkle resistance, easy-care, and shrink resistance.
It is first person because the author said, "So then I understood," which shows the author is in the situation.