Veja o que diz o Webster's, no significado 1 do substantivo:

attendant (-dent)
adj.
1 attending or serving [an attendant nurse]
2 being present
3 accompanying as a circumstance or result [attendant difficulties]
n.
1 a person who attends or serves [an attendant at the zoo, a queen's attendants]
2 a person present
3 an accompanying thing; concomitant


(C)1995 Zane Publishing, Inc. (C)1994, 1991, 1988 Simon & Schuster, Inc.



Para stweard, veja o significado 5:

steward (stoerd, styo-)
n.
1 a person put in charge of the affairs of a large household or estate, whose duties include supervision of the kitchen and the servants, management of household accounts, etc.
2 one who acts as a supervisor or administrator, as of finances and property, for another or others
3 a person variously responsible for the food and drink, the service personnel, etc. in a club, restaurant, etc.
4 a person, usually one of a group, in charge of arrangements for a ball, race, meeting, etc.
5 a) an attendant, as on a ship, train, etc., employed to look after the passengers' comfort b) flight attendant
6 an officer on a ship who is in charge of stores and culinary arrangements
7 short for shop steward
8 a person morally responsible for the careful use of money, time, talents, or other resources, esp. with respect to the principles or needs of a community or group [our responsibility as stewards of the earth's resources]
vi.
to act as a steward
vt.
to be the steward of (something); manage
stewardship
n.

Etymology
[ME stiward < OE stiweard < stig, enclosure, hall, sty1 + weard, keeper, ward]

(C)1995 Zane Publishing, Inc. (C)1994, 1991, 1988 Simon & Schuster, Inc.