compañero
noun
1. Companion, friend, consort, an equal, a match, a compère, a mate, one with whom a person frequently converses; fellow. (m & f)
Compañero de viaje -> fellow traveler
Compañero de juego -> playmate
2. Compañero de cuarto, roommate; chum, a roommate in the universities. (m & f)
3. Comrade, colleague, fellowmember, condisciple. (m & f)
Compañero de armas -> comrade-in-arms
Compañero de trabajo -> workmate
4. Partner, associate, coadjutor. (m & f)
5. Follower, one who shares the lot and fortune of another. (m & f)
6. One thing suited to another. (m & f)
Dos clacetines que no son compañeros -> two socks which do not match
¿Dónde está el compañero de éste? -> wher is the one that goes with this