collection of things in the same category

to collect things in the same category

一塁手: a first baseperson; a first baseman; a first basewoman

kind, sort, type, class, genus, order, family / similar example, parallel

kind, sort, type, the like / a similar thing, parallel / (taxonomy) a conventional grouping that corresponds to a class or an order / (logic) Short for 類概念 (ruigainen).

sort, kind, type

(baseball, softball) a first baseperson; a first baseman; a first basewoman

(baseball, softball) a third baseperson; a third baseman; a third basewoman

in heaps

The hiragana syllable しゅ (shu). Its equivalent in katakana is シュ (shu).